Advanced materials company, First Graphene Limited (ASX: FGR) is working with the University of Adelaide (UoA) on graphene for industrial building products.
Graphene in Concrete
Experiments have been conducted on the use of graphene oxide (GO) being added to concrete to improve both compressive and tensile strength. However the hydrophilic and high resistivity nature of GO limits its applications in things such as ‘smart’ cement.
Due to the high aspect ratio of nano-reinforcements such as graphene and carbon nanotubes, they have the ability to arrest crack propagation in concrete (by controlling the nano-sized cracks before they form micro-sized cracks) and hence greatly improve peak toughness, making them more effective than even conventional steel bar or fibre reinforcements.
Premium Concrete Products – Smart Cement
Ultra-High Performance Concrete (UHPC) operates at such a high-performance level that it competes with steel rather than regular concrete grades. Advantages include lower lead times compared to steel. UHPC can cost in excess of $500/tonne, with enhancements such as micro-reinforcements further increasing the price.
Due to the immense importance of compression strength and other factors such as blast, ballistic and earthquake resistance, additive premiums can be significant. UHPC is over an order of magnitude more expensive than regular concrete, but in an environment where material usage and weight are such essential considerations, it can actually be cheaper to use the more expensive grades in the long run, especially factoring in the reduced maintenance costs incurred by UHPC.
The UoA is testing FGR graphene, with the aim of making “smart cement” with conductive graphene flakes which may;
i. address the concerns of cracking and corrosion, and
ii. provide conductivity for better monitoring the health of concrete structures.
The first test results indicate the addition of just 0.03% standard graphene by weight is the optimal quantity of graphene from the test conducted to date, showing a 22 - 23 % increase in compressive and tensile strength, respectively. The addition of more standard graphene does not increase or decrease the strength of the concrete material when compared to the control in this test work.
Promising Results with Favourable Economics
This initial work has yielded very promising results with very small amounts of FGR graphene required to greatly increase the strength of the materials. Determining the optimum mixing methods and concentration to develop a consistent material will be the key to further developing this project.
The focus of the next stage of the work will be trialling other concentrations of graphene in concrete, specifically loading at 0.01% and 0.1% graphene, and optimisation of the mixing procedures. New methods of incorporating graphene into the concrete mixture will also be trialled.
The graphene provided by FGR will have a range of aspect ratios (smaller sheet sizes) and will be tested over the full range of concentrations. It is anticipated this material will better disperse within the concrete mixture and therefore provide further mechanical strength improvements.
The concrete admixtures market is estimated to be worth US$18.10bn by 2020. The drivers identified for the concrete admixtures demand are growing infrastructure requirements in developing economies, improving economics of construction, and shifting preferences of population towards urbanisation.
Advanced materials company, First Graphene Limited (FGR), has provided an update on its development of the graphene based FireStop™ fire retardant material.
Development of the FireStop™ material is being conducted in conjunction with the University of Adelaide as part of the Company’s participation as a Tier 1 participant in the ARC Research Hub for Graphene Enabled Industry Transformation.
The video below shows the dramatic effectiveness of FireStop™when applied to simple wooden structures. Whereas the untreated structure on the left is totally consumed by fire, the structure treated with the FireStop™ retardant doesn’t even catch fire even after five minutes of trying to light it with a blow torch.
Given that fires generally start at specific ignition points, the ability of a graphene-based retardant to stop the ignition is a key feature of the product. The FireStop™ was applied in three coats, was applied by brush and was less than 500 μm thickness.
Note: There is no sound for this video.
The relevant characteristic of graphene that this demonstration highlights is the very high thermal conductivity i.e. the ability to disburse heat away from the source. FGR is highly encouraged by the results of this simple demonstration, which augers well for subsequent, more advanced and scientifically controlled demonstrations that are being undertaken.
The University of Adelaide has now received a UL-941 system for use in its workshop. It is also installing an LOI instrument for the generation of scientific data. These instruments will enable an acceleration of the test work being conducted to optimise the FireStop™ product and application methodology.
[ UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing, is a plastics flammability standard released by Underwriters Laboratories of the United States. The standard determines the material’s tendency to either extinguish or spread the flame once the specimen has been ignited. UL-94 is now harmonized with IEC 60707, 60695-11-10 and 60695-11-20 and ISO 9772 and 9773. ]
Further tests will be conducted to increase the viscosity of the product while maintaining the fire-retardant performance. This work will be the precursor to submitting FireStop™ to FGR’s own testing to the relevant fire standards and to CSIRO for independent testing in Q1 2018. In the meantime, the Company is entering negotiations with potential industry partners for the commercialisation of FireStop™.
A group of researchers from Denmark, UK and Spain within the Graphene Flagship project, explains in a recent review paper why the graphene industry needs better and faster electrical characterisation methods. The Graphene Flagship is a large European project, with more than hundred research groups collaborating on development of novel graphene technologies and applications.
Just 5 years after the first announcement that graphene could be isolated at all, Rod Ruoff (2009) and Samsung (2010) showed that graphene can be synthesized in a deceptively simple way; by decomposing hydrocarbons at high temperature, leaving single layer graphene sheets to crystallise on a copper surface.
Today, just 7 years later, graphene sheets are produced and used in large quantities – or areas – for instance for cell phone touch screens, according to Chinese researchers.
While large-area fabrication is taking off fast, the methods for quality control are lagging behind – and this is particularly true with respect to the electronic properties that are central to many applications.
Electrical measurements are most often done by turning the graphene film into a number of electrical devices, where field effect measurements give the “key performance indicators” of conductivity, carrier density and mobility. Depending on the number of devices, and the time spent on measuring, such tests can also give an idea about the variability. The two main drawbacks are ; (1) the process is fundamentally destructive – the graphene is irreversible damaged in the process, and (2) the throughput is many orders of magnitude smaller than the CVD-based fabrication of the graphene in the first place creating a bottleneck.
Researchers at the Technical University of Denmark and at the National Physics Laboratory in UK have over the past several years developed a number of fast, large-scale, non-destructive characterisation techniques of electronic properties that they believe have the potential to become game changing technologies.
A recent review focuses on one of these: terahertz time-domain spectroscopy (THz-TDS).
THz-TDS shoots terahertz pulses through the graphene and measures how much the film absorbs. The absorption spectrum up to 2 THz depends distinctly on the conductivity as well as on the scattering time – a measure of the average time the carrier spend between collision with obstacles.
Knowing these two, the carrier density and mobility can be computed. The technique has been meticulously verified against electrical measurements and is now being proposed as a metrology standard, in collaboration with the Spanish company DasNano, who are the first to manufacture terahertz-based conductivity mapping equipment for graphene.
Peter Bøggild, professor at DTU puts it like this: “Trivially, there can be no industry without quality, and there can be no quality without quality control. Non-contact mapping is fast and non-destructive, so anyone interested in consistency, reproducibility and reliability of graphene films, should pay attention.”
Quietly, behind the scenes and under the cover of NDA’s and confidentiality agreements, graphene is making significant commercial advances.
Speaking with graphene producers, the story this year has been consistent; they are selling material but they are unable to publicly disclose the end-users or the application areas due to the commercially sensitive information and the desire for their customers to maintain a first mover advantage.
So how do you promote a material for which there are limited examples and the customers will not agree to be named or to allow the products to be disclosed?
Based on conversations with producers, we know enough to be able to say with confidence that the majority of the material being sold is “bulk” graphene; this refers to graphene nano particles (GNPs), graphene oxide (GO) and reduced graphene oxide (rGO), graphene powders, graphene in suspension and graphene sold in master batches.
We know that the lion’s share of the market is for nanocomposite materials based on surveys of more than 400 graphene application developers, producers and end-users. In fact it is more than 50% of the total current market.
These applications include the use of graphene in plastics, polymers, 3D printing, rubber, with carbon fibers and CNTs, as well as in concrete and steel applications.
We also know that virtually every major bona fide graphene producer has announced or has indicated a significant production capacity increase for 2017, 2018 or 2019 at the latest, based on the market pull through for the material.
And this progress is not limited just to bulk graphene but also to single layer CVD graphene as well with the recent ability to produce wafer sized products at a dramatically reduced price compared to just 1 year prior.
How do we take the next steps towards greater commercialization?
The Graphene Council is working with vertical industries, like the composites sector, to help educate and inform those companies that would be the largest buyers and users of this material about how graphene enhances or enables better solutions (strength, flexibility, conductivity, wear resistance, thermal properties, etc.).
We see our mission as being a catalyst to help raise the level of awareness in the end-user community about the possibilities that graphene offers and to dispel some of the myths that have been created from the over-hyped expectations of the past few years.
In a recent review of more than 60 graphene products, more than 45 different material characteristics were listed by at least one of the materials studied. Yet not one single characteristic (not the carbon content, not the carbon layer count, etc.) was common across every product. In fact, there was not a single material characteristic as listed on the specifications sheets that was shared by more than 75% of the products listed.
It is impossible for a buyer of graphene to be able to compare products based on the spec sheets alone and it is prohibitively expensive to expect the consumer to test each supplier’s material to just know what they are getting.
As a result, we see a tremendous need to help buyers identify trusted suppliers of quality materials.
As we enter 2018, The Graphene Council will focus on accelerating the commercial adoption of graphene and representing the interests of our members by;
a.) educating targeted industries like composites, coatings, energy storage, etc.,
inov-8 is launching a revolutionary world-first in the sports footwear market following a unique collaboration with scientific experts. The British brand has teamed up with The University of Manchester to become the first-ever company to incorporate graphene into running and fitness shoes.
Laboratory tests have shown that the rubber outsoles of these shoes, new to market in 2018, are stronger, more stretchy and more resistant to wear.
Michael Price, inov-8 product and marketing director, said: “Off-road runners and fitness athletes live at the sporting extreme and need the stickiest outsole grip possible to optimize their performance, be that when running on wet trails or working out in sweaty gyms. For too long, they have had to compromise this need for grip with the knowledge that such rubber wears down quickly."
“Now, utilising the groundbreaking properties of graphene, there is no compromise. The new rubber we have developed with the National Graphene Institute at The University of Manchester allows us to smash the limits of grip."
“Our lightweight G-Series shoes deliver a combination of traction, stretch and durability never seen before in sports footwear. 2018 will be the year of the world’s toughest grip.”
Commenting on the collaboration and the patent-pending technology, inov-8 CEO Ian Bailey said: “Product innovation is the number-one priority for our brand. It’s the only way we can compete against the major sports brands. The pioneering collaboration between inov-8 and the The University of Manchester puts us – and Britain – at the forefront of a graphene sports footwear revolution."
“And this is just the start, as the potential of graphene really is limitless. We are so excited to see where this journey will take us.”
The scientists who first isolated graphene were awarded the Nobel Prize for physics in 2010. Building on their revolutionary work, the team at The University of Manchester has pioneered projects into graphene-enhanced sports cars, medical devices and aeroplanes. Now the University can add sports footwear to its list of world-firsts.
Dr Aravind Vijayaraghavan, Reader in Nanomaterials at the University of Manchester, said: “Despite being the thinnest material in the world, graphene is also the strongest, and is 200 times stronger than steel. It’s also extraordinarily flexible, and can be bent, twisted, folded and stretched without incurring any damage.
“When added to the rubber used in inov-8’s G-Series shoes, graphene imparts all its properties, including its strength. Our unique formulation makes these outsoles 50% stronger, 50% more stretchy and 50% more resistant to wear than the corresponding industry standard rubber without graphene.”
“The graphene-enhanced rubber can flex and grip to all surfaces more effectively, without wearing down quickly, providing reliably strong, long-lasting grip."
“This is a revolutionary consumer product that will have a huge impact on the sports footwear market.”
Certainly as one of the leading research institutes in the world for the development of automotive technology, Fraunhofer has a global reputation for delivering the latest cutting edge breakthroughs in any technology associated with the automotive industry from energy storage to lightweight engineering.
Based on Fraunhofer’s titanic reputation in R&D, it was a stroke of luck that The Graphene Council was able to meet up with Fraunhofer’s Head of Functional Materials, Ivica Kolaric, at the Economist’s “The Future of Materials Summit” held in Luxembourg in mid-November.
In his role as leader of the functional material group at Fraunhofer, Kolaric has been conducting research on nanoscale carbon materials, like graphene, for almost 20 years. The aim of all this work has consistently been to produce functionalized nanoscale carbon materials to bring them to industrial applications.
Kolaric and his team have been working specifically on graphene since 2008 and have been synthesizing graphene using both chemical vapor deposition (CVD) as well as exfoliation techniques. With these various grades of graphene, the Fraunhofer researchers have experimented with a variety of applications.
“We first started with applications in the field of energy storage and transparent conductive films,” said Kolaric in an interview at the Luxembourg conference. “As you may remember there was a big discussion a few years back going on if graphene could serve as a replacement for idium tin oxide (ITO). But we determined that this is maybe not the right application for graphene because when you use it large areas for conductive films it’s competing with commodity products.”
Kolaric also explained that Fraunhofer had collaborated with battery manufacturer Maxell in the development of different types of energy storage devices, specifically supercapacitors. They had some success in increasing the energy density of these devices, which is an energy storage device’s ability to store a charge. With the graphene, the increased surface area of graphene did give a boost to storage capabilities but it just couldn’t deliver enough of an increase in performance over its costs, according to Kolaric.
Now Kolaric says that Fraunhofer is looking at graphene in sensor applications, in particular biosensors. “Graphene is really a perfect substrate for doping, so you can make it sensitive for any kind of biological effects,” said Kolaric. “This could make it a very good biosensor.”
But Kolaric cautions that avenues for purification have to be developed. If this and other issues can be addressed with graphene, there is the promise of a sensor technology that could be very effective at detecting gases, which currently is tricky for automotive sensors that are restricted to detecting pressure and temperature. “I think graphene can play an important role in this,” added Kolaric.
In addition to next generation sensors, Kolaric believes that graphene’s efficiency as a conductor could lead to it being what he terms an “interlink” on the submicron level. Kolaric believes that this will lead to its use in power electronics.
Kolaric added: “I would say sensors and serving as an interlink, so these are the two occasions where we think graphene can be effective.”
Advanced materials company, First Graphene Limited (ASX: FGR ), officially opened its Commercial Graphene Facility (CGF) at a ceremony with Mr Josh Wilson MP, Federal Member for Fremantle, Australia on Thursday 23, November 2017.
FGR Chairman, Warwick Grigor stated “This Facility represents both the completion of one journey and the commencement of another.” The first part of the journey had commenced in May 2015 when testing of FGR’s material was undertaken at the University of Adelaide. “The tests were done, and they confirmed that not only could graphene be recovered, but of the 50 or more types of graphite that Professor Dusan Losic and his team had tested, the vein graphite (from FGR) gave the best results. ”
First Graphene Board Members L to R; Chris Banasik, Peter Youd, Warwick Grigor and Craig McGuckin
Mr Grigor added, “ There are two very impressive aspects of this wonderfully innovative venture. The first is the very short time frame in which it has been achieved. The second is the very small expenditure that has been involved. Both are a credit to the resourcefulness of the FGR team, led by ourManaging Director, Craig Mc Guckin.Through careful management and sourcing ofequipment for this production facility, management has been able to achieve excellent costs reductions. In many cases these savings have been up to 80%. Rather than accept off-the-shelf quotes from German suppliers, Craig has engaged with manufacturers in China to design and procure equipment at significant savings. That is what good management does for a company.”
MrJoshWilson MP,Federal Member for Fremantle speakingat theofficial opening.
Officiallyopening the facility Mr Wilson remarked“It really is no exaggeration to say that graphene will likely be one of the defining substances and technologies of the 21st century.It is wonderful that the enormous potential of graphene will be explored and enabled through a production facility here in Henderson; in the Fremantle electorate; in the state of Western Australia.It’s exactly the kind of smart, innovative, cutting- edge business that we should be in; that we need to be in.”
Mr Wilson went on to state “I expect that the development of processes and applications that involve graphene– like the development of renewable energy technology; like innovations in medical science– will have a particularly profoundbeneficialimpactincountriesthatfacedevelopment challenges, including a number of countries in our region.Making a contribution to lifting the standard of living and the quality of life the world over through invention and innovation is a great Australian tradition."
Last week, the city of Luxembourg played host to The Economist’s “The Future of Materials Summit”. The agenda was heavily influenced by the Russian-based single-wall carbon nanotube (SWNTs) producer, OCSiAl, which not only sponsored the event but also plans to open a SWNT production facility in Luxembourg.
With the Luxembourg prime minister, Xavier Bettel, providing a keynote in which he expressed his hope that Luxembourg could bring back its manufacturing glory days when it was one of Europe’s largest steel producers, the hope seemed to be squarely placed on the potential of SWNTs to be the engine for Luxembourg’s economic transformation back to manufacturing.
In what may have been the most interesting set of ironies of the conference, one of the world’s largest steel producers today—Tata Steel—provided testimony that the future of steel manufacturing is not turning towards the expensive and finicky SWNTs, but instead is developing a cheaply produced form of graphene that promises to drastically improve corrosion resistance in steel.
Sanjay Chandra, Chief of Research and Development and Scientific Services at Tata Steel, provided one of the only examples at the conference on how novel materials move from discovery to high volume production. And in this case, the discovery process was quite unexpected.
“We were looking at coatings that would improve the corrosion resistance of steel,” said Chandra in an interview immediately after his presentation. “There is already zinc, of course, but there are a lot of environmental issues with the zinc as well as the costs associated with it. So we came across this bio product from a tree. It is the secretion that an insect makes as it sits on the seeds of the tree. You could call it a bio extract, and we were able to convert this material into graphene.”
The graphene takes the form of graphene oxide in which the carbon-to-oxygen ratio is about 30% to 40%, and, according to Chandra, it provides very good corrosion resistance.
“Its conductivity is good enough for some of the sensors that are used in the pharmaceutical industry and the main feature of our product is that can we can produce it at a very low cost because it can be produced in very large volumes and very rapidly,” said Chandra.
Currently, the process that Chandra and his colleagues at Tata Steel are employing with the graphene oxide is a manual process of dipping the steel in a liquid created by this powder. While this is good enough for testing, Chandra concedes that in order to replace zinc in steel production they will need to develop a more refined process.
“We need a process that can fit into a steel plant that is producing these galvanized sheets of steel at very high speeds and all in one sequence,” he added. “So for us to be able to do that that's a bit of a challenge.”
Part of the challenge is that it is very difficult to get someone to retrofit a steel assembly line because of production disruptions. However, with the graphene material offering at least a doubling of corrosion resistance over zinc and offering biocompatibility there is certainly reason to look into overcoming these production obstacles.
Most of the research and development that has been done so far with the material and processes has been performed in house at Tata Steel. Chandra explained that this was not because of any reticence to work with outside research groups—which Tata Steel does quite regularly—but instead they have not been able to identify the appropriate group that could help them scale up the production for steel applications. Another problem is just the culture of the steel industry, which has proven to be not very good at engineering and design, which is where the current problems resides.
To address these issues Tata Steel has taken the forward thinking measure of funding a new research group at the Indian Institute of Technology in Madras to look at among other things this material and how to potentially scale up production. Tata steel has also enlisted the research support of The Centre for Nano Science and Engineering (CeNSE) in Bangalore, India to investigate the potential sensor applications of the graphene material.
For Chandra the project has been ongoing for the last two-and-a-half years, and he says the development that has been made thus far has been very fast. “We’ve gone from a research curiosity and then to a research project in R&D to where we are now with a small production unit on the R&D level,” he added.
In addition, Chandra believes that the work at CeNSE could start producing tangible dividends from their research in as soon as a year from now. The material could enable glass to turn from clear to opaque with just the passing of current through it with the graphene providing the conductivity in the glass.
In the meantime, Chandra is looking for other collaborators, especially any organizations that can offer expertise and insight on how to scale up a steel production process that employs a graphene oxide for corrosion resistance.
Posted By Terrance Barkan,
Sunday, November 5, 2017
Updated: Sunday, November 5, 2017
Graphene, the world's first two-dimensional material, is many times stronger than steel, more conductive than copper, lightweight, flexible and one million times thinner than a human hair.
Graphene is set to improve the quality of life for many across the globe. Potential applications include inexpensive water purification systems; greener, more efficient cars and planes; flexible phones and even biomedical applications such as wound healing and cancer treatments.
Graphene’s commercial adoption will be accelerated by answering two key questions: what are the characteristics of commercially-supplied graphene? And how can they be used to best effect?
The establishment of common industrial metrics, regarding for example the number of layers or flake size, is crucial for the uptake of graphene-based technologies.
The National Graphene Institute at the University of Manchester has partnered with NPL to produce a guide, as part of NPL's good practice guide series, that aims to tackle the ambiguity surrounding how to measure graphene’s characteristics.
Material standardisation is crucial for industry uptake. There are many early adopters of graphene but without standardisation it is difficult for industry to be assured of the quality and properties of its graphene samples.
This guide seeks to address this gap and brings together the accepted measurement techniques in this area. It describes the high-accuracy and precision required for verification of material properties and will enable the development of other faster quality control techniques in the future.
Intended to form a bedrock for future interlaboratory comparisons and international standards, the guide will accelerate the development of graphene-enabled technology and improve the ability to produce graphene in a reliable and repeatable way.
Dr Andrew Pollard, lead author of the guide and Senior Research Scientist at NPL, commented:
"Although there are many ways to measure the properties of different types of commercially-available ‘graphene’, industry needs a standardised set of measurements. This will enable companies to select the type of material best suited to their needs by reliably comparing key characteristics, supporting the development of innovative new technologies based on graphene. This guide is the first step in this process, and as the basis of international measurement standards currently being developed, will provide measurement protocols that can be used in the interim."
James Baker, Graphene Business Director at the University of Manchester, said:
"This good practice guide has been developed by the NGI and NPL teams to allow the nascent graphene industry to perform accurate, reproducible and comparable measurements of commercially supplied graphene. This will address this important commercialisation barrier by providing users with a consistent approach to the structural characterisation of graphene whilst international measurement standards are being developed".
Nanotechnologies — Vocabulary — Part 13: Graphene and related two-dimensional (2D) materials
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies. The work of preparing International Standards is normally carried out through ISO technical committees. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The Graphene Council is proud to be a formal member of both, the ISO/ANSI TC 229 Nanotechnology Standards Development Group as well as the USNC Technical Advisory Group to IEC TC 113, Nano-Electrotechnologies.
Our focus is on the development of standards that will benefit suppliers, buyers and users. We firmly believe that clear standards will foster greater adoption of graphene and graphene related products.
Now, in a series of in-person interviews with several researchers at ICFO (the first of which you can find here), we are gaining better insight into how these technologies came to be and where they ultimately may lead.
The combination of graphene with quantum dots for use in optoelectronics stems in large part from the contributions of Gerasimos Konstantatos, a group leader at ICFO, who worked with Ted Sargent at the University of Toronto, whose research group has been at the forefront of exploiting colloidal quantum dots for use in a range of applications, most notably high-efficiency photovoltaics.
“Our initial expertise and focus was on actually exploiting the properties of solution-process materials particularly colloidal quantum dots as optoelectronic materials for solar cells and photodetectors,” explained Konstantatos. “The uniqueness of these materials is that they give us access to a spectrum that is very rarely reached in the shortwave and infrared and they can do it at a much lower cost than any other technology.”
Konstantatos and his group were able to bring their work with quantum dots to the point of the near-infrared wavelength spectrum, which falls in the wavelength size range of one to five microns. Konstantos is now developing these solution-based quantum dot materials to produce even more sensitive materials capable of getting to 10 microns, putting them squarely in the mid-infrared range.
“My group is now working with Frank Koppens to sensitize graphene and other 2D materials in order to make very sensitive photodetectors at a very low cost that are capable of accessing the entire spectrum, and this cannot be done with any other technology,” said Konstantatos.
What Konstantatos and Koppens have been able to do is to basically eliminate the junction between graphene and the quantum dots and in so doing have developed a way to control the charge transfer in a very efficient way so that they can exploit the very high mobility and transport conductance of graphene.
“We can re-circulate the charges through the materials so that with a single photon we have several billion charges re-circulating through the material and this constitutes the baseline of this material combination,” adds Konstantatos.
With that as their baseline technology, Konstantatos and his colleagues have engineered the quantum dot layer so instead of just having a passive quantum dot layer they have converted it into an electro-diode. In this way they can make much more complex detectors. In the combination of the graphene-based transistor with the quantum dots, it’s not just a collection of quantum dots but is a photodiode made from quantum dots.
“In this way, we kind of get the benefit of both kinds of detectors,” explains Konstantatos. “You have a phototransistor that has a very high sensitivity and a very high gain, but you also get the high quantum efficiency you get in photodiodes. It’s basically a quantum photodiode that activates a transistor.”
In addition to the use of graphene, the ICFO researchers are looking at other 2D materials in this combination, specifically the semiconductor molybdenum disulfide. While this material is a semiconductor and sacrifices somewhat on the electron mobility of graphene, it does make it possible to switch off the material to control the current. As a result, Konstantatos notes that you can have much lower noise in the detector with much lower power consumption.
In continuing research, Konstantatos hinted at yet to be published work on how all of this combination of quantum dots and graphene could be used in solar cell applications.
In the meantime, the work they have been doing with graphene and quantum dots is much further advanced than what they have yet been able to achieve with molybdenum disulfide, mainly because work has advanced much further in making large scale amounts of graphene. But as the processes for producing other 2D materials improves, there will be a real competition between all of the 2D materials to see which provides the best possible performance as well as manufacturability properties.
In any event, Konstantatos sees that the way forward with both quantum dots and 2D materials is using them together.
He adds: “I think we can explore the synergies in between different material platforms. There's no such thing as a perfect material that can do everything right. But there is definitely a group of materials with some unique properties. And if you can actually combine them in a smart way and make hybrid structures, then I think you can have significant added value.”
Versarien plc, an advanced materials engineering group, has announced that it has entered into a collaboration with Israel Aerospace Industries ("IAI") to enable both groups to work together to develop and test Versarien's proprietary Nanene few layer graphene nano-platelets in aerospace composite structures.
IAI is a world leader in both the defence and commercial markets, delivering state-of-the-art technologies and systems in the domains of: air, space, land, sea, cyber, homeland security and intelligence, surveillance and reconnaissance.
IAI has agreed to purchase Nanene from Versarien, in a variety of forms, which will then be incorporated into composite panels for testing and evaluation, with a view to developing commercial applications for the technology. The collaboration is additionally expected to incorporate discussions and work with IAI's supply chain.
Moshe Medina, EVP and General Manager of IAI's Engineering and Development Group, commented: "IAI looks forward to collaborating with Versarien on graphene based composites, which we believe will help us create stronger and multi-functional materials. It is an ongoing challenge to harnesses the excellent micro- properties of graphene for enhancement of our composites."
Neill Ricketts, CEO of Versarien, commented: "We are delighted to be working with IAI, a global leader in aerospace technologies, to incorporate our graphene into a variety of composite structures. We will be working closely with the teams at IAI and their suppliers to test and evaluate the benefits of adding graphene to a variety of composite structures.
"The agreement with IAI is a significant step forward for Versarien, our first graphene collaboration in the aerospace sector, but it is just one example of the global relationships we are developing. There is increasing interest in the benefits that high quality graphene, of the types manufactured by Versarien, can add to material properties and we look forward to announcing further collaborations in due course."
Posted By Terrance Barkan,
Monday, October 30, 2017
Updated: Monday, October 30, 2017
Haydale Technologies and Imagine Intelligent Materials have signed a strategic agreement to establish graphene-based conductive coatings capability in North America.
The agreement includes:
Haydale to acquire exclusive license to Imagine IM’s “Plant In A Box” graphene processing technology
Establishes US supply chain for revolutionary graphene-based conductive coatings that are purpose-designed for global US$22bn geosynthetics marketplace
Coatings product proven in Australian market and being installed as part of Coal Seam Gas containment systems to enable hole detection pre-final commissioning
Haydale will import inventory of imgne® X3 to support planned field trials and early adopter orders
The signing of a Letter of Intent (LOI) between Haydale and Imagine IM marks the first step in establishing a strategic collaboration between two companies that are leading globally the development of commercial applications using graphene.
In parallel with this, Haydale has issued a Purchase Order to Imagine IM for a quantity of Imgne X3 that will be sufficient to enable 50,000m2 of conductive geotextile to be manufactured. This will ensure that there is available supply in the US ahead of the commissioning of a full-scale plant at Haydale’s manufacturing facility in Greer, SC.
The first full-scale Imagine IM graphene research plant was officially opened in August 2017 by Australia’s Assistant Minister for Industry, Craig Laundy. This followed the establishment of a pilot plant in 2016. The Assistant Minister, opening the plant, said: “Imagine IM have demonstrated a capacity to both develop and manufacture highly effective end products which have revolutionary implications for manufacturing industries in Australia. They’ve done that by embracing new technologies, linking with global value chains, and developing high value-added products.”
The agreement between Haydale and Imagine IM Is intended to enable more industrial end-users to accelerate the take up of graphene-based composites and coatings into global advanced manufacturing supply chains. It will also mean that production of materials that make geosynthetic materials “smart” will be fast tracked in the US.
Chris Gilbey, CEO of Imagine IM said, “Combining Imagine IM’s proven graphene manufacturing processes with Haydale’s advanced materials manufacturing expertise will be a significant step toward delivering disruptive graphene-based coatings solutions into the North American market. It comes on the back of successful product installations in Australia and a full order book for product to our licensee Geofabrics Australasia, the leading textile manufacturer in Australia.
Ray Gibbs, CEO of Haydale Graphene Industries PLC, said “This is a very important strategic step in Haydale’s global growth plan. This partnership builds on our existing nano dispersion know how and patented material doping technology and now extends our graphene footprint in the US. It also gives Haydale direct access to the world’s largest market for coated geosynthetics. This is just the what we see as a major opportunity for further collaboration with Imagine IM on a wide range of graphene enhanced applications.”
Trevor Rudderham, President and CEO of Haydale Technologies Inc, said, “We are very pleased to sign this strategic agreement with Imagine IM. They are an impressive company with world leading product and process technology in the graphene arena. This will be Haydale Technologies first graphene related manufacturing initiative in the US and is an exciting development for us. Our team in Greer, SC has the process engineering, application expertise and sales capability in advanced materials to ensure this will be a very successful endeavour for both Haydale and Imagine IM.”
Note: Haydale Graphene Industries and Imagine IM are Corporate Members of The Graphene Council.
The use of graphene in the growing field known as plasmonics—in which the waves of electrons known as surface plasmons that are generated when photons strike a metallic structure—has been transforming the world of photonics and optoelectronics, enabling the possibility of much smaller devices operated by photons rather than electrons.
It’s worth providing a bit of background on the field of plasmonics before jumping to this latest research. The use of photons instead of electrons for something like an integrated circuit has the clear benefit that photons travel much faster than electrons, promising much faster devices. However, the use of light in these applications is limited by the relatively large size of wavelengths of light. Light is fast, but their wavelengths are much larger than nanometer-scale dimensions of most integrated circuits.
Plasmonics provides a way to convert that light—photons—into waves of electrons that can be tuned to have much smaller dimensions than those of light. The dimensions of these plasmon waves can be a hundred times smaller than the smallest wavelengths of light. This means that light can serve as the basis of photonic integrated circuits, but many more devices than that.
The field of plasmonics has really taken in off in the last half-decade, and ICFO has been at the forefront of a lot of that work, especially in using graphene to enable the effect. However, what Garcia de Abajo has proposed is a new theoretical approach to generate visible plasmons in graphene not from light but from tunneling electrons.
In research published in the journal ACS Photonics, Garcia de Abajo and his colleague Sandra de Vega have suggested that there are more efficient ways of generating surface plasmons on graphene than using an external light source and have instead shown through models that graphene plasmons can be efficiently excited via electron tunneling in a sandwich structure formed by two graphene monolayers separated by a few atomic layers of hexagonal boron nitride.
As mentioned, it’s possible to tune the size of the plasmon waves, especially graphene plasmons, which can be changed in size according to the amount of doping level (an addition of other materials). While high doping levels can push the wavelength of the graphene plasmons towards the visible range, these grpahene plasmons primarily reside in the mid-infrared region, which translates into a weak coupling between far-field light and graphene.
What de Vega and García de Abajo have proposed is a methodology for visible-plasmon generation in graphene that requires no light at all. Instead, plasmons are generated from tunneling electrons, which are electrons that are able to pass through a material on the quantum level that they could not otherwise pass through.
To achieve this photon-less plasmonics, the researchers propose a graphene–hexagonal boron nitride (hBN)–graphene sandwich structure. In their model, the hBN layer is 1-nm thick that is sandwiched between two graphene monolayers.
When the right amount of voltage (bias) is applied between the two graphene sheets, it produces tunneling electrons through the gap. The researchers discovered a particular voltage window in which the tunneling electrons lose energy through the excitation of a propagating optical plasmon rather than dissipate through coupling with the vibrations of the crystal lattice of hBN that carry heat, which are known as phonons, (low bias) or electron–electron interactions (high bias).
One of the side benefits of plasmonic devices that operate in this way—without the need for photons—can also be used in reverse as sensors. In this way when a change occurs in the graphene plasmon properties, that change could lead to a voltage readout.
An international team of researchers led by Professor Steven Conlan, Swansea University Medical School and the Centre for NanoHealth has won an international award for a graphene biosensor based diagnostic test for ovarian cancer which is quicker, more accurate, less expensive and portable.
The team developed a testing device which can diagnose ovarian cancer in a few minutes using a drop of blood. This portable technology is different from the ones currently in the hospital environment and allows for greater flexibility in terms of monitoring a patient even after she has already been diagnosed with ovarian cancer.
As well as the test being simple and fast the test does not require a technically-developed laboratory or a specialized technician to operate it which reduces costs and means that there isn’t a need for a centralisation of services. The device can also be used with other biomarkers to detect other types of disease.
Ovarian cancer research award Professor Conlan, together with colleagues Dr Sofia Teixeira (Swansea University College of Engineering), Drs Lewis Francis, Deya Gonzalez and Lavinia Margarit (from the Swansea University Medical School), and Dr Ines Pinto from the International Iberian Nanotechnology Laboratory, INL, Braga, Portugal have been recognised for their pioneering work with the award of the i3S Hovine Capital Health Innovation prize.
Professor Conlan said: “The Hovione prize will allow the team to initiate the process of moving our device from the lab to the patient. Whilst there is much work to be done, this is an important step towards the better and earlier diagnosis of patients with ovarian cancer. Cooperation between the two European centres has been key in realising this achievement.”
i3S Hovine Capital Health Innovation prize, created this year, aims at distinguishing innovative ideas in the area of health. The winners of the grand prize receive €35,000 in financing and services that include a market study, development of a business plan, technology validation by industrial experts, and support in setting up a company based on the winning technology.
The i3S-Hovione Capital Health Innovation Prize is supported internationally by the European Institute of Innovation and Technology (EIT-Health) and has partnerships with several entities, such as Bluecinical (PT), Patentree (PT), SRS Advogados (PT), Impact Science (UK), and ANI / MCTES (PT) through its Bfk Award.
The Graphene Flagship is the EU's largest ever research initiative with more than 150 partners in over 20 European countries.
Since early 2017, 15 new partners have been accepted and the number of Associated Members and Partnering Projects continues to grow, adding value to the joint graphene and related materials research effort.
According to European Commission's interim review report of the project's first year following the two-and-half-year ramp-up phase, the Graphene Flagship has achieved most of its objectives and milestones and has delivered exceptional results with significant immediate or potential impact.
The Graphene Flagship consortia has produced over 600 scientific publications, 37 patent applications, 17 products on the market and six spin-off companies during this 12-month period.
The Graphene Flagship is further commended for focusing its work towards a more industrially oriented initiative with a higher Technology Readiness Level.
"We are glad to have received such a positive evaluation feedback from the European Commission as it is an important acknowledgement that we are progressing in the right direction towards our overall goal, which is taking graphene and related materials from academic laboratories to the factory floor," says Jari Kinaret, Director of the Graphene Flagship.
Significant results close to commercial exploitation mentioned in the report include the Airbus winglet made of graphene composites, a motorcycle helmet with a graphene coating, a new viscoelastic graphene-polymer sensor material, perovskite photovoltaic cells with improved stability and a demonstration of tuneable ion sieving using GO membrane for water desalination.
Graphene enhanced helmet by Italian Graphene Flagship partner IIT and MomoDesign on display at Composites Europe in Düsseldorf - Courtesy of Graphene Flagship
These achievements are all the more impressive when considering how long it has traditionally taken a new material to break through to commercial application.
As stated in this recent blog, Thomas Skordas, the EU Director "Digital Excellence and Science Infrastructure" at the Directorate General for Communications Networks, Content and Technology (DG CONNECT) said;
"Firstly, it takes time to do research and generate good results. Usually up to 20 years is needed for a new material to find its way to market. Thanks to its long lasting collaboration between academia and industry, Graphene Flagship proves that this process can be substantially accelerated, contributing to shortening drastically the cycle from research to innovation. The results start showing that this is a valuable research and innovation model."
We couldn't agree more.
The mission of The Graphene Council is to support the commercial adoption of graphene, world-wide.
We congratulate the Graphene Flagship and its many partners on the progress they are making and wherever possible, we will continue to support and compliment those efforts.
Advanced materials company, First Graphite Limited (ASX: FGR) has announced the appointment of Dr Andy Goodwin as a consultant to the Company.
For the last five years Dr Goodwin has been Business Director, Advanced Materials Division, at Thomas Swan & Co Limited in Consett UK. Thomas Swan and Co, a private company, is one of the leading graphene companies based in the UK.
Dr Goodwin has been primarily responsible for development and commercialisation of graphene products. Not only will Dr Goodwin be of great assistance to First Graphite as it prepares to take its products to the market, but his location in the UK will give the Company a valuable presence and capability in the important, expanding market for graphene in Europe.
Prior to joining Thomas Swan Dr Goodwin was the Global Science & Technology Manager – Solar, for Dow Corning Corporation, in the USA. Dr Goodwin has a Ph.D. in Polymer Chemistry and an MTE Diploma from the International Institute for Management Development Business School in Lausanne, Switzerland.
Dr Goodwin will take up his position with the Company in early October 2017.
Commenting on this appointment, FGR’s Managing Director Craig McGuckin said
“We are very pleased to have Andy joining our team. I believe his decision to join FGR validates the approach we have taken to progressing our advanced materials projects and IP. Andy has proven leadership capabilities with global teams and a successful track record of delivering results in both corporate and small business environments. His being based in the UK will be particularly helpful in assisting with working with our European and UK based clients.
The board welcomes Andy to our growing team and looks forward to a long and mutually rewarding relationship”
Dr. Andy Goodwin likewise commented on his new role:
“I'm pleased to be joining the FGR team and helping to grow the business - FGR has a great position in high quality graphite RMs, a low cost graphene production process and an appetite for downstream opportunities. There's plenty to be excited about.”
With buyers uncertain of how to integrate graphene into their products and suppliers often in a race against time to bring a product to market, can the gap be bridged?
The myriad industries that potentially can be impacted by graphene seems at times a bewildering blizzard of possibilities with no clear path on how to access any of them. If graphene does work for applications ranging from photovoltaics to advanced composites, how does it do it and how can those underlying industries extract the benefits from it for their products?
While the major chemical companies struggle with the learning curve of how they can best use graphene to enable their products effectively, graphene suppliers are struggling with the time it takes to walk those buyers through that learning curve.
“The biggest challenge is accelerating the testing of products with large companies to convince the rest of industry to make the change to incorporate a new material,” said Mark Thompson, Chief Executive Officer of Australia-based Tagla Resources, in a Q&A interview with The Graphene Council last month. Thompson added that in addition to the challenge of time, companies like his face the perennial problem of lack of investor and business knowledge of how graphene really works in an application.
Graphene suppliers face this lack of knowledge among their buyers almost universally. While some suppliers are better equipped to last out the long vetting process, the results are not just taxing to the financial stamina of small companies, but are impacting the overall business of graphene.
“We have encountered customers who are either using low-quality graphene, or graphene oxide in some cases, where they are not maximizing the potential of their products,” said Mr. Ho, Chairman of Perfect Right Limited, an Asia-based graphene producer and a subsidiary of Oovao Powers Holdings Limited, in a Q&A with The Graphene Council last June. “Until commercial applications of graphene-enhanced products become widespread and the application of graphene in products is better understood, we will continue to see a fragmented industry where end users are not able to maximize the potential of graphene in their products.”
While much work is done to improve manufacturing processes of graphene—both in terms of the quantity and quality of the product to improve industry uptake—these efforts both may be missing the larger point, which is to make a masterbatch material.
“I believe that in any industry you always start with the customer need. Quality is less important than functionality and price,” said Chris Gilbey, CEO of Australia-based Imagine IM, in a Q&A with The Graphene Council last March. “What we focus on is developing fit-for-purpose graphene at the lowest possible price, and at a location that meets the supply chain objectives of customers.”
While this, of course, makes logical sense for any supplier, are the real-world experiences of graphene producers lining up their product with buyers’ expectations? UK-based Haydale Graphene Industries Plc has had an exclusive agreement with Huntsman Corporation to develop a graphene infused Araldite® epoxy resin, and according to Haydale’s CEO, Ray Gibbs, in an interview with The Graphene Council last month, it has been a journey.
“There are no sales yet but it’s been good for us though because we've learnt an awful lot of know-how about how to mix, choosing appropriate dispersions methods, what cure protocol to adopt and how the surface activations of materials affect our materials,” said Gibbs in the interview. “One fundamental thing that it proved to us is that Huntsman did not want any change to the resin once we added in nanomaterials. Generally, adding nanomaterials at low levels will alter the viscosity and downstream processing methods. The minute you do that is when capital expenditure happens and that alerts the finance teams to cash outflows (often not in any budget). The key then is to avoid processing changes and the need for capital spend. The work has produced some fundamental know how on mixing, dispersion and processing.”
All the suppliers spoken to acknowledge that this learning curve needs to be shortened. Certification is cited by most as a way to shortcut through the quality assurance concerns for buyers. It would help the buyers to de-risk their business plans with graphene.
“We spend a lot of time going around the world doing a lot of presentations just trying to grow belief by providing verified data, which is crucial in getting the customer to say, “OK, it's not just been verified by the suppliers it’s been verified by an independent third party.” For me, that’s another area of credibility that needs to be driven by the industry,” said Gibbs.
Certification can be costly and the bodies that have established those certifications remain often in the planning stages. What remains is an educational process. And the responsibility of that education is increasingly being taken up by not just the graphene suppliers, but by industry groups, such as The Graphene Council.
Gibbs added: “I think the Graphene Council has got a role to play where it's important to inform and to get industry to think about the benefit derived from a consistent, quality supply of material.”
UK-BASED G2O Water Technologies is to scale up production and field-test its patented graphene oxide water filters in a new £1m (US$1.3m) project.
The funding for the project has largely come from UK government research funding arm Innovate UK, with the remainder provided by G2O's project partners, including speciality chemical manufacturer William Blythe.
G2O Water Technologies’ filters can be printed using a low-cost method, or made by applying a graphene oxide coating to polymer membranes. The graphene oxide coating makes the membrane more permeable, allowing more water to pass through and meaning up to 50% less energy is needed to drive the process. The company believes that it could one day result in being able to do away with the need for pumps for membrane purification systems and rely instead on gravity.
“As we are taking a porous polymer material as the substrate, and the filtration by size exclusion is happening in the surface layers of graphene oxide, it is expected to be significantly cheaper than some current membranes due to its simplicity. However, when this is packaged into a domestic system, eliminating the need for pumps, ozone, UV etc, it means that the purification system can be significantly cheaper too, potentially extending access to clean water to more people,” said Tim Harper, G2O CEO and founder.
The company hopes to develop and market cheap domestic water purification units for use inside the home, in areas of the world where the water supply is not reliably clean, with contaminants including pesticides, heavy metals and plastic microfibres. Products could range from a simple jug to more sophisticated appliances. Harper says the company’s system “makes obtaining clean water as simple as making a cup of filter coffee.”
The new £1m funding will allow G2O Water Technologies to develop large-scale manufacturing processes for the filters using industrial printing technology. It will work with the Centre for Process Innovation (CPI) and its industry partners. G2O will then embark upon field testing with a major global consumer products company with a significant market share in Asia and Africa, although the company did not reveal which. The project will last for 26 months, and G2O believes that a final commercial product using its filters could ready in three years.
The funding follows a previous £700m Innovate UK grant in 2015. Over the past two years, G2O has worked with the CPI to help transfer and scale up the technology from laboratory to industry.
“G2O’s graphene filter technology has the potential to dramatically reduce the cost of treating water, thereby increasing the availability of safe drinking water. This project provides us with the ability to validate and accelerate an innovative, emerging technology that can help us develop the next generation of cost-effective systems for clean, potable water. This is key to meeting diverse, consumer demand across the globe,” said Harper.
When people start looking into the commercialization of graphene and graphene-enabled products, one of the first companies they likely come across is the UK-based Haydale Graphene Industries PLC.
This is due—at least in part—to the fact that Haydale has been around for a relatively long time in the graphene business and was one of the first publically traded graphene suppliers, not to mention it being one of the leading companies in the production of graphene from facilities in the UK, USA and the Far East.
Over the years, Haydale has established itself as one of the go-to companies if you wanted graphene to have just the right properties for the device you wanted to develop. The task of functionalizing and dispersing graphene so that it bonds with the resin or polymer matrix in which it is being used has proven trickier than many companies had initially thought, leaving the uninitiated mixing in batches of graphene to their product only to have it make the product worse rather than better. By providing the expertise on how to extract the attractive properties from graphene, Haydale has created the backbone of its business.
In recent years, Haydale has continued to move up the value chain offering its own devices based on its functionalized graphene.
Now Haydale has become one of The Graphene Council’s Corporate Members, and we took that opportunity to talk to the company’s CEO, Ray Gibbs, to ask about the company’s most recent commercial developments as well as see how he sees the market evolving over time. Here is our interview:
Q: Your purchase of Advanced Composite Materials, what did that give you that you didn’t have before and how has it changed your business?
The simple answer us it gave us a presence in the USA, which is a massive market—and gave us a base in the USA with meaningful sales. Also, we have a new nanomaterial that broadened our offering and is now part of our advanced materials Strategic Business Unit. The business itself had 15 plus blue-chip companies as clients. The aim is to cross sell some of our other nanomaterials, such as Graphene and Carbon Nano Tubes, into them. So that is really good news and even more so as we've grown that business with a new $2.6 million contract in April of this year.
Q: You have divided your business into two business units. Resins, Polymers, and Composites, which will concentrate on marketing and selling the newly developed graphene infused carbon fibre pre-impregnated materials (‘pre-preg’). The second unit, Advanced Materials, principally hosts the Group’s silicon carbide (‘SiC’) products and the newly developed graphene inks and pastes for the self-monitoring blood glucose device market. Why was this done and what do you anticipate it will allow you to do?
The key element to making these two strategic business units is focus. These business units are profit and loss driven.Each has a dedicated managing director. One is based in the USA and that is Trevor Rudderham. He’s been on board from the time we bought the company, Advanced Composite Materials, in South Carolina. We also have a new person who has recently started named Keith Broadbent. Keith has come from Ultra Electronics, a large UK defense company. Before that he was running the production for prestigious Princess Yachts and Sunseeker International. So, he knows an awful lot about the composites industry. This really is all about focusing on products and profits by driving sales in this fiscal year.
Q: Huntsman Corporation (‘Huntsman’) for graphene infused Araldite® epoxy resin. What’s happening there at this point? And what is Huntsman expecting to do with the epoxy resin? If it goes through, do you expect this to open up possibilities with similar big chemical companies?
We started our collaboration with Huntsman, a world leader in high end epoxy resins and adhesives, with an exclusivity arrangement about 18 months ago and it's been quite a journey. There are no sales yet but it’s been good for us though because we've learnt an awful lot of know-how about how to mix, choosing appropriate dispersions methods, what cure protocol to adopt and how the surface activations of materials affect our materials. One fundamental thing that it proved to us is that Huntsman did not want any change to the resin once we added in nanomaterials. Generally adding nano materials at low levels will alter the viscosity and downstream processing methods.The minute you do that is when capital expenditure happens and that alerts the finance teams to cash outflows (often not in any budget). The key then is to avoid processing changes and the need for capital spend. The work has produced some fundamental know how on mixing, dispersion and processing. The overall effect produces a result which we call “functional intensity”.
Yes we've got an exclusive with Huntsman and they've been very prescriptive in telling other people that have approached them that they are working with Haydale and no one else, which is great news and very reassuring But in terms of that, they're honed their focus unashamedly on thermal conductivity. Why? Because thermal conductivity can improve thermoset output by up to 100%. In thick section moldings, such as wind turbine blades, for example, if you can reduce the exotherm reaction (heat) resulting from the “setting process” by 50% and the resin cure time by 50% then you have about a 100-percent increase in output. Not only that but the heat management produces a better-quality product, with less rejection and homogeneous cure. Now that is a pretty fundamental improvement if you look at the way that the composite industry is today and the production constraints that exist.
So Huntsman is all about better quality, and speed of output and being able to work on thicker structures. Of course, there is not only one aspect of the composites industry; you've got electrical conductivity some mechanical issues to address as well.We have seen a 20% increase in mechanical performance of a carbon fibre composite, independently verified. That offers a potential weight saving of one fifth if you keep the same mechanical performance. Some of the other things that came out of that work has meant that we have been very successful improving aircraft composites. For example, in conjunction with Airbus and GKN we have produced an aileron that is 600 percent higher in its electrical conductivity, capable of defeating certain levels of lightning strike. Potentially our work could reduce the parasitic copper in an aircraft which can weigh up to 3 tonnes. Now that is a big thing for the aviation industry wishing to find ways of reducing weight.
Q: Haydale has become known as one of the most established expert companies on how to functionalize graphene in the precise way to make any given product possess the properties that your clients are attempting to achieve. Can you detail how that expertise evolved? Did each new customer provide new challenges and discoveries that led you to understanding how graphene can best be functionalized? Or was it just a matter of applying the same fundamental principles and practices to different clients? Or was it a combination of both?
The key thing is everyone's material—when they provide it—is different. Different shapes, sizes, flakes, thicknesses and it all comes with different levels of activated chemicals on the surface. So, if you've got a material that's come with a lot of oxygen on the surface, you're not going to get electrically conductive material because oxygen is an insulator and that may be inappropriate for certain applications. Hence, knowing and understanding the raw untreated materials is critical. That is something we have done for years now—we call it material fingerprinting—knowing what is on the surface of the material that we receive from a range of customers or suppliers is crucial. It may be that it's used with the functional groups already on the surface and it is compatible with the host material. On the other hand, it may not be suitable “chemically” for the application. And if it's not then we will use our own patented process to change the surface activation using our low temperature patented plasma technology. It's all about knowing and understanding what you've got and applying your own technique and processes to get the desired product improvement.
Q: We’ve seen some of your reported work with graphene inks to create film pressure sensors. Can you give us an update on that work and where it now stands commercially?
Several of these projects remain under non-disclosure agreements so that might be difficult to do. But we have got a number of things in the works with our patented pressure sensor. This derived from using our own proprietary inks by the Welsh Center for Printing and Coating at Swansea University. We have a five-year agreement with them that anything produced using our material we get right of first refusal on the intellectual property (IP). With the graphene loaded piezo resistive ink used to make the pressure sensor we filed a patent on this product. There is a range of things that we're looking at the moment, some in the sporting arena, some in protective elements and others in diagnostic mode—I can't really say much more! Suffice to say, we are in the process of getting applications moving from a commercial aspect and there’s a lot of potential activities to go at from adding pressure sensors on flooring to predict foot fall in the retail industry, to measuring impact on athletes engaged in contact sport for example. There are many industrial applications too offering massive opportunities. Its an exciting area, and all derived from Graphene.
Q: Is the aim of your company to move further up the value chain to producing devices that use your functionalized graphene? If so, what kind of devices are you looking to make and in what application areas? And how do you eventually seeing your company being arranged, i.e. 50 percent production of functionalized graphene for clients and 50 percent of your own production of devices based on your graphene?
I think if you look at the market place what you see is many producers trying to go up the value chain by providing some form of added value material. That material forms what I would call a master batch and it comes in many forms. For example, our conductive ink is form of a master batch because it’s using a resin—as a binder-based system—it’s adding graphene and other materials up to 40% to it to create a conductive screen printable ink. And we've been successful in the Far East in our new operation over there in producing some biomedical sensor inks. That's a part of the production line of a self-diagnostic biomedical device, which is blood glucose monitor.
By applying that same principle to what we just talked about with the Huntsman epoxy in terms of supplying a master batch into a customer so they can use as a concentrated form, a bit like a paste like the Coca-Cola syrup, for example: Customers receives the epoxy concentrate, dilutes it down with the neat base resin to what loading they want to use and you have a controlled process. That's really what I see. I don't envisage Haydale as a business selling anyone graphene flakes or powders because that frankly is a “me-too” commodity in my view. It also means we don't have the same element of control because the customer can take the graphene that you supplied—functionalized as appropriate—and it may or may not work because effectively they may have the wrong mixing and processing tools and protocols. And so we've got no control over that. Working with the customer in partnership is key.
What we have fundamentally is a supply chain set up through our collaboration partners, such as AMG in Germany who have some of our plasma reactors and they're ready to produce industrial quantities of masterbatch.
Q: What remains one of the biggest challenges in the commercialization of graphene-enabled products, i.e. price, quality of product, buyer awareness, etc.?
There is definitely a need for customer awareness of what can be done with nanomaterials. Everyone talks about standardization. A lot of the materials in the graphene space derive from effectively mined organic material, such as graphite. Graphite has been mined and sold for over 150 years but does not have any standards. But then you're dealing with things in the microscale as opposed to the nanoscale, which is one magnitude smaller than micro.
So effectively what you end up with graphite is small changes in supply impurities and the like make little or no impact if you put it into the industrial product like carbon brakes shoes or refactory linings.Once you get to the nano-stage, knowing what you've got is very important as little impurities make a difference and therefore, yes, that is one important aspect of the whole process.
For me, inconsistencies need to bethe key message. Standardization is important and it will become very relevant particularly for large organizations seeking consistent volume supply; and I think what we've learned, particularly with the likes of Huntsman, for example, is that the two key questions they want to know is what is your disaster recovery plan for anything you supply us and do you have a more than one production site. Plus, secondly how robust is your supply chain. Those aspects will impact on people going forward.
I do think that the marketplace is getting itself ready.Price is an issue where values for what appears similar products can be markedly different. The trained buyer will always look for the cheaper price but that may be a mistake especially if a material that is twice the price of another only needs a quarter of the loading of the cheaper material. Production is probably in advance of supply.I’ve met many customers who tried nano materials before and said it doesn't work because I think probably they really didn’t understand what the material they had in terms of its functional group, its size, its morphology and the loading levels required. Agglomeration is an often-used complaint. Knowledge is beginning to permeate through the industry, which is good news. There’s lots of companies out there that are willing to take this on because when you change fundamentally products with very small doses of nanomaterials—we’re talking about under half of 1 percent here and sometime less—those massive changes can deliver real value.
Q: What do you think is the most important role for industry groups to play in helping to address those issues?
I think a lot of that is due to understanding of the marketplace. There is still a bit of hype that is still in the industry. Hype is not necessarily always bad as long as it is controlled. Hype helps generate ongoing research and development for all the processes and products. Hype goes astray when it makes exaggerated or wild claims that produce a distrust or misuse of materials in the marketplace. I think that's beginning to be understood. This is where the likes of the Graphene Council and others have a role to play in educating industry generally. We can use any help we can get to do that as we grow the market. There are too many providers chasing a market that is growing but is not large enough to satisfy production capacity today. If that isn’t rectified soon I would expect there to be casualties, and that is already happening.
We meet a number of companies that say, “I’ve tried carbon nanotubes, I’ve tried graphene and it doesn't work.” But in the past the engineer would actually say, “Oh well, I'll put more into this mix because it's bound to improve it.” In our nano world adding less is more. It’s an education process that for me is crucial in the industry we're in today.
I think the Graphene Council has got a role where it's important to inform and in to try to get industry to think about the benefit derived from a consistent, quality supply of material. We spend a lot of time going around the world doing a lot of presentations just trying to grow belief by providing verified data, which is crucial in getting the customer to say, “OK, it's not just been verified by the suppliers it’s been verified by an independent third party.” For me, that’s another area of credibility that needs to be driven by the industry.
A word of caution from someone who spends his life in this area: there are no magic products yet which will revolutionize the way we live. There is great hype surrounding the potential of graphene, but our experience tells us that we should be talking about evolution, not revolution. Our aspirations are great, but we will see transformation over time.
We are already creating transformation, some things at a quicker pace than others. We have combined scientific knowledge, technological innovation and engineering know-how to create products that are significantly better than their predecessors. But we need opinion formers and august bodies to align with the producers and users of nano materials. This is where the likes of the Graphene Council, The National Graphene Institute in Manchester and the EU based Graphene Flagship have major parts to play.
We absolutely believe there is so much more we can do and so much further than we can go, but to do so, we need to work in partnership with other major organizations who are the ‘early adopters’ those prepared to take calculated risks for that is where true economic returns arise – together we must go out into the new territories and explore what is possible. Eyes wide open!
By doing so, we can work together to forge a better future for us all and ultimately, create material change in the world around us. That is the Haydale vision.
There are many different ways in which a graphene supplier can find its way into the marketplace. They might start off as research contractors in the field and discover a process for producing graphene that they believe has a competitive edge.
Another route is to start off in the mining of graphite—the material from which graphene is synthesized—and look into new avenues for exploiting their product.
One company that has followed this path is Australia-based Talga Resources, which mines its high quality graphite deposits in Northern Sweden and processes that ore into graphene that should be suitable for a wide range of potential applications.
Talga recently joined the growing list of The Graphene Council’s corporate partners at which time we took the opportunity to speak to Talga’s Chief Executive Officer, Mark Thompson, to ask him more about the direction of the company and their perspective on the issues facing the growing graphene marketplace.
Q: Do you consider Talga Resources a mining company or an advanced materials company? Why one and not the other?
We see ourselves as an advanced materials company. This is because the majority of our output is functionalized and formulated graphene additive products produced in-house, and utilizes our own 100% owned technology in the product not just raw products.
Has this perception changed over time? Yes, the separation occurred first as we started developing our own processing technology in 2014 and moved to product development in 2016. Mining is now just one of our competitive advantages in owning our complete supply chain. We also have a range of valuable non-carbon mineral assets that can be developed such as cobalt and copper that are also part of the technology metals and clean-tech supply chain.
Q: What kind of graphene are you producing, i.e. how is manufactured and what applications is best suited for?
We electrochemically exfoliate our graphite ore directly into pristine graphene nanoplatelets and a few layers graphene, not graphene oxide.We do in-house functionalization then to create dispersion and product performance, such as conductivity or adhesion. But it is a tunable process so we can produce a range of graphene particle morphologies.
We are using these morphologies successfully in a variety of coatings, batteries, composites and concrete products. Obviously these are large volume current markets where our economics and scale can provide the material solution, as compared to CVD type applications.
Q: Are you functionalizing the graphene in any way?
Yes, we do in-house chemical functionalization.
Q: How far up the value chain to ultimately expect to be moving in the graphene market, i.e. do you foresee you producing actual devices from graphene or will you continue to supply others with graphene to make products?
We can supply raw or basic value-added products directly, but tend away from retailing and towards formulated solutions and product systems, that can be master batches or incorporated into a current product process line.
Q: What do you see as the biggest challenge in the graphene market at large and how does that translate into challenges for your business?
Time. The biggest challenge is accelerating the testing of products with large companies to convince the rest of industry to make the change to incorporate a new material. Down the road will be process controls for quality and consistency, and the perennial problem of lack of investor and business knowledge of how graphene really works in an application.
Q: You are an Australian-based company with mining operations in Sweden. Are you producing the graphene in Europe or Australia?
All graphene is produced in Europe, with bulk raw materials made at our test process facility in Rudolstadt, Germany and the UK subsidiary based in Cambridge responsible for product development.
Q: What sort of advantages does having operations on two continents provide you and what are the challenges?
The advantage of having our downstream and upstream processes separated is that they can be more flexible and faster to develop.The challenge is that they are spread out but they will be consolidated more once the first commercial plant is built in Sweden.
Q: What sort of efforts are needed for the graphene market as a whole to improve uptake by the various application markets that are impacted by it, i.e. standardization, dissemination of information, industry advocacy?
I believe graphene producers should do less raw supply and more value-added or advanced prototype products.With current market relevance and pricing it will improve uptake faster than regulation, standards and info. Proof of performance at scales bigger than the lab will lead faster to commercial outcomes than providing raw materials to end users without skills to incorporate it.
Q: How do you see the graphene business evolving over the next five years and what do you aim at making Talga Resources role in that business?
The graphene business will undergo a great deal of failures and M & A activity while commercialization grows in the background with a few key companies. Most will migrate from raw material and basic dispersions to more formulated value-added additives targeting specific products in collaboration with industry. This will be on current market products, not futuristic aspirational products. Talga is already ahead on this path and aims to be a very profitable and global leader in graphene enabled products well within 5 years.
Australian-based Imagine Intelligent Materials has released a new case study that looks at the commercial deployment of a new type of conductive geotextile, made possible with the company’s imgne® X3 coating. The new graphene-based material is used as part of a solution developed by fluid storage tank company, called Concept.
Concept builds fluid storage systems that have many applications within the mining industry, including fluid processing facilities, irrigation water storage, dust suppression water storage, construction water, potable water and grey water at camps.
These fluid storage systems consist of large steel or concrete tanks that are lined with four different types of liner systems: primary liner, composite net layer, leak detection layer (secondary layer) and geotextile cushioning layer.
It is within the composite net layer (Geomembrane/Geonet) that Intelligent Materials’ imgne® X3 coating is used to separate the leak detection system from the primary layers and to assist in the flow of water.
When these liner systems were used prior to the introduction of the imgne® X3 coating in the composite net layer, it was necessary to wet this layer with water to make it conductive, which added cost and complexity to the project.
In addition to the extra costs of shipping in water, the previous arrangement led to false positives in the lead detection system.The water used to wet the layer between the primary and secondary liners often led to false leak reports in the leak detection system
The case study with the imgne® X3 coating on the composite net layer eliminated the need to wet the material—a boon for locations that are remote and the climate is arid.This absence of water needed to wet the material to make it conductive also eliminated the false positives.
In the video below, you can learn more about Imagine Materials' imgne® X3 coating operates.
The efforts of The Graphene Council in providing information to the graphene community receives strong corporate support.
The Graphene Council, the largest member-driven community in the world focused on graphene research and commercialization, has reached a key milestone by adding its tenth corporate member bolstering its efforts in representing and providing information to the graphene community.
Representing graphene producers on four continents, these leading companies and association recognize the value of sharing and disseminating information across an open platform where the views and issues surrounding graphene research and commercialization can be advanced.
“Partnering with other organizations to further the sharing of information and enhancing the discussion around technologies not only helps SPIE meet its charter but, more importantly, enables the advancement of research, science, engineering and practical applications in these technologies,” said Robert F. Hainsey, Ph.D., the Director of Science and Technology for SPIE.
Established in late 2013, The Graphene Council quickly developed the largest LinkedIn group in the field of graphene and an even larger private community with 8,500 members. It has significantly expanded its reach and impact through original market survey reports and by providing original content in newsletters, articles and blogs.
One of the first providers of online webinars dedicated to the commercial issues surrounding graphene, The Graphene Council has also researched and published one of the most extensive surveys of companies producing graphene on the status of commercialization and highlighting major issues. This survey has also served as a key document in government-led analysis of the graphene market.
The Graphene Council is also the sole provider of the 2017 Bulk Graphene Pricing Report, the most up-to-date and detailed analysis of how graphene can compete in application areas that includes composites, thermo plastics, 3D manufacturing, rubber and plastics, cement, lubricants and many others.
The Graphene Council has also partnered with Springer Nature publications to publish the first academic journal dedicated to applied graphene research and analysis, The Graphene Technology Journal, the first full issue will be published in September 2017.
As a formal member of the ISO/ANSI TC 229 Nanotechnology Standards Development Group as well as the IEC TC 113 Nano-Electrotechnologies, the Graphene Council is at the forefront of the development of graphene standards that will benefit graphene suppliers, buyers and users.
For more information about joining the leading community in the world for graphene professionals, please visit The Graphene Council.
Terrance Barkan CAE, Executive Director
Direct: +1 202 294 5563
The Graphene Council’s industrial partners span from North America to Europe and all the way to Australia. But our latest industrial partner hails from Hong Kong and as such represents the Council’s first Asian corporate partner.
It is sometimes difficult to learn how Asia-based graphene producers see the graphene marketplace and how they see themselves fitting into the overall scheme of things. So our interview with Mr. Ho, Chairman of Perfect Right Limited, a subsidiary of Oovao Powers Holdings Limited, provided us with a unique opportunity to learn about an Asia-based graphene producer that moved beyond marketing materials.
What we can learn from those marketing materials is that Perfect Right Ltd. developed its low-cost process for producing high-quality graphene this year. What you will learn in this interview is what that process is, how they are functionalizing their graphene and how and when they intend to move up the graphene value chain.
The details contained in this interview will provide us with key insights on how this company sees its place in the marketplace now and well into the future.
Q: Can you please tell us what kind of process you have developed for producing a high-quality graphene in bulk quantities, i.e. chemical vapor deposition, liquid-phase exfoliation, plasma, etc.?
We synthesize graphene with an arc-discharge method.The electric arc oven for synthesis of graphene mainly comprises two electrodes in the atmosphere of air. The cathode and anode are both pure graphite rods. As the rods are brought close together, discharge occurs resulting in the formation of plasma.
Q: How have you improved on one of these processes to make it produce a higher quality of graphene at bulk quantities?
We have enhanced and patented our new production method, including the modification of production equipment, which produces high quality graphene that retains graphene’s desired properties, using a low current to create the arc discharge, effectively lowering the cost of production significantly.Our solution is also scalable, and we are able to ramp up production of our high quality graphene in accordance with market demand.We already have full production lines running at our factory, and we plan to expand our production capability as demand for our high quality graphene ramps up.We are continuing to fine tune various parameters in the production process, resulting in a continuous improvement in the quality of the graphene being produced in both purity and domain size, as evidenced by independent lab test results. Our production process is cost effective and completely environmentally-friendly.
For what applications have you functionalized your graphene? I see that many applications of graphene have been identified on your website, but for what specific applications are you functionalizing your graphene?
We are focused on the functionalizing graphene in the areas of energy storage, supercapacitor, coatings, and focused on utilizing the conductive properties of graphene in various applications.We are currently working with organizations in academia and industry, developing promising applications in the areas mentioned above, and aim to have commercial applications which are ready for market within the next 12 to 18 months.
What is your business model, i.e. are you producing master batches of functionalized graphene for various device manufacturers or are you producing these functionalized graphene materials for your own device manufacturing? If so, what are those devices or technologies?
We currently have our scalable production lines producing high quality graphene for use in the applications being researched, working in collaboration with organizations in academia and industry to bring to market consumer ready solutions which maximizes the unique properties of graphene.Our business model is to solidify and scale our graphene production, and in lock step develop commercial applications using our high quality graphene.We believe graphene applications has so far eluded the wider consumer market due to the lack of high quality and stable graphene supply being made available at cost effective prices.We believe our production method is the solution, as we will be able to provide high quality graphene at prices which will make the consumer applications cost effective, leading to wider adoption of graphene in even more applications.
What are the greatest challenges your company currently faces in the marketplace, i.e. cautious customers unsure of a new material for their processes, a stable value chain, etc.?
We believe our challenges are twofold, product differentiation and application. There are numerous graphene producers in the market; however, there seems to be a wide range in terms of quality and supplies available.We have encountered customers who are either using low quality graphene, or graphene oxide in some cases, where they are not maximizing the potential of their products.As for application, we believe that is an issue that faces all companies in the graphene space.Until commercial applications of graphene enhanced products become widespread and the application of graphene in products better understood, we will continue to see a fragmented industry where end users are not able to maximize the potential of graphene in their products.
What do you see as the key to success for graphene establishing a foothold for itself in the marketplace, i.e. a ‘killer app’, standardization in graphene, etc.?
We believe standardization of graphene will go a long way towards the adoption and wide spread use of graphene.Through our market research and interaction with academia, investment funds, and potential end users, one common theme is that there is a wide range of graphene products already in the market, but the lack of standardization makes it very hard for users to compare products, or to even secure a stable supply for their own use.Another milestone is to have a wide spread consumer facing application where the advantages of using graphene in that product is immediately recognizable.Graphene has been in the news for some time, however there are still no breakthroughs in the areas which graphene is known to be good for, e.g. energy storage, applications taking advantage of its conductivity, etc.
Where do you see your company in the next five years?
We see ourselves as being one of the premier suppliers of high quality graphene in the Asia region, and also an enabler of the commercialization of graphene enhanced products, through our partnerships with academia and industry players.We aim to have graphene enhanced products on the market within the next two years, and will focus on projects where the successful commercialization of that product will help push the entire graphene industry forward.
Earlier this month, Montreal-based NanoXplore announced its intentions to become a publicly traded company on the Toronto stock exchange by what has been termed an “arm’s length reverse take over" of Graniz Mondal Inc. This transaction will amount to NanoXplore taking the place held by Graniz on the Toronto stock exchange as a publicly traded company.
“You have two ways to go public: You can do it through an initial public offering. Or you can do a transaction with an already existing company in the public markets, which is a so-called shell and use that shell to become public,” explained Soroush Nazapour, president and CEO of NanoXplore in an interview with The Graphene Council.
Nazapour estimates that the transaction should be completed by the end of August at which time NanoXplore will begin trading.
The minimum amount of capital that has to be raised through the public offering will be $2 million. However, Nazapour expects that the company will raise capital far above that figure, which will go to provide working capital and also support the $10-million Sustainable Development Technology Canada (SDTC) program it was awarded last year.
The SDTC program is an attempt by the Canadian government to develop graphene-enabled polymers that could replace metal components in electric vehicles for reducing weight. Developing polymers that have the electrical, thermal and mechanical properties of metals has been a challenge, and the aim of this project will be to see if graphene can lead to polymers with these properties. This project is expected to last a total of five years.
“In the automotive industry a lot of parts are either metals or plastics that don't have the performance required,” explained Nazapour. “So what we're doing is adding graphene to the plastic to improve the performance of those plastics and replacing the metal with these improved plastics.”
In the video below, the rationale for pursuing graphene-enabled polymers, especially for transportation applications, is laid out.
While the SDTC program could eventually lead to an entirely new business segment for the company, NanoXplore has announced top line revenues of $2.5 for the first nine months of this fiscal year. Nazapour expects that growth rate to continue until the end of the fiscal year, leading to approximately $3 million in top line revenues. These revenues are generated from the graphene-enabled buoys that are used in aquaculture industry.
Nazapour expects that the capital generated from being publicly traded will support these ongoing operations as well as the SDTC program. But he is also looking ahead to further developing NanoXplore’s ambitions to manufacture graphene-enabled Li-ion batteries.
In addition to the pending introduction to the Toronto exchange, NanoXplore also has a new website from when we last interviewed Paul Higgins, the chief operating officer at the beginning of this year. With the new website also comes a new corporate logo.
Complimentary metal-oxide semiconductors (CMOS) have served as the backbone of the electronics industry for over four decades. However, the last decade has been marked by increasing concerns that CMOS will not be able to continue to meet the demands of Moore’s Law in which the number of transistors in a dense integrated circuit doubles approximately every two years. If CMOS is going to continue to be a force in electronics, it will become necessary to integrate CMOS with other semiconductor materials other than silicon.
In research described in the journal Nature Photonics, the ICFO researchers combined the graphene-CMOS device with quantum dots to create an array of photodetectors.
While the photodetector arrays could enable digital cameras capable of seeing UV, visible and infrared light simultaneously, the technology could have a wide range of applications, including microelectronics to low-power photonics.
“The development of this monolithic CMOS-based image sensor represents a milestone for low-cost, high-resolution broadband and hyperspectral imaging systems" said, Frank Koppens, a professor at ICFO in a press release.
Koppens, who The Graphene Council interviewed back in 2015, believes that "in general, graphene-CMOS technology will enable a vast amount of applications, that range from safety, security, low cost pocket and smartphone cameras, fire control systems, passive night vision and night surveillance cameras, automotive sensor systems, medical imaging applications, food and pharmaceutical inspection to environmental monitoring, to name a few."
The researchers were able to integrate the graphene and quantum dots into a CMOS chip by first depositing the graphene on the CMOS chip. Then this graphene layer is patterned to define the pixel shape. Finally a layer of quantum dots is added.
“No complex material processing or growth processes were required to achieve this graphene-quantum dot CMOS image sensor,” said Stijn Goossens, another researcher from ICFO in Barcelona. “It proved easy and cheap to fabricate at room temperature and under ambient conditions, which signifies a considerable decrease in production costs. Even more, because of its properties, it can be easily integrated on flexible substrates as well as CMOS-type integrated circuits."
The graphene-enabled CMOS chip achieves its photoresponse through something called the photogating effect, which starts as the quantum dot layer absorbs light and transfers it as photo-generated holes or electrons to the graphene. These holes or electrons move through the material because of a bias voltage applied between two pixel contacts. The photo signal triggers a change in the conductivity of the graphene and it is this change that is sensed. Because graphene has such high conductivity, a small change can be quickly detected giving the device extraordinary sensitivity.
Andrea Ferrari, science and Technology offficer of the Graphene Flagship added: "The integration of graphene with CMOS technology is a cornerstone for the future implementation of graphene in consumer electronics. This work is a key first step, clearly demonstrating the feasibility of this approach.”