{"id":15009,"date":"2021-10-14T15:14:51","date_gmt":"2021-10-14T14:14:51","guid":{"rendered":"https:\/\/www.innovationnewsnetwork.com\/?p=15009"},"modified":"2021-11-12T14:20:17","modified_gmt":"2021-11-12T14:20:17","slug":"low-cost-industrial-scale-high-quality-cvd-graphene-production","status":"publish","type":"post","link":"https:\/\/www.innovationnewsnetwork.com\/low-cost-industrial-scale-high-quality-cvd-graphene-production\/15009\/","title":{"rendered":"Low cost, industrial scale, high-quality CVD graphene production"},"content":{"rendered":"<h2>A \u2018wonder material\u2019 trapped in the lab for almost two decades, graphene\u2019s potential has finally been unlocked with the production of cost effective, high-quality CVD graphene.<\/h2>\n<p>Graphene has been heralded as a \u2018wonder material\u2019 since its discovery by Professors Andre Geim and Konstantin Novoselov in 2004. And why not? With the thickness of a single atom, pristine graphene has been tested in countless theoretical experiments, all of which have demonstrated that its properties are extraordinary, including:<\/p>\n<ul>\n<li>Ultrathin (.345 nm);<\/li>\n<li>Young\u2019s modulus of 1 Tpa;<\/li>\n<li>Intrinsic tensile strength of 130 GPa (&gt;200x stronger than steel);<\/li>\n<li>Thermal conductivity &gt; 3,000 WmK (graphite is 2,000 WmK);<\/li>\n<li>Optical absorption of exactly \u03c0\u03b1\u22482.3% (i.e., transparent);<\/li>\n<li>Impermeable barrier to all gases;<\/li>\n<li>Room temperature electron mobility of 200,000cm<sup>2<\/sup>\/(V\u00b7s) (silicon is 1,400 cm<sup>2<\/sup>\/(V\u00b7s));<\/li>\n<li>breakdown current density of 10<sup>7<\/sup> A\/mm-<sup>2<\/sup> (copper is 1,000 A\/mm-<sup>2<\/sup>); and<\/li>\n<li>Easily functionalised and integrable into production lines.<\/li>\n<\/ul>\n<p>Let\u2019s put that into plain English: graphene is the strongest, thinnest, and most conductive material known to man. It is also transparent, impermeable, chemically inert, and biocompatible. The potential of graphene was thought to be limited only by our imagination, leading to suggestions that it could enable us to produce an endless supply of clean water, batteries that could be recharged in seconds, but which would last for days \u2013 and even a space elevator! Is it any wonder Geim and Novoselov were awarded the 2010 Nobel Prize for Physics?<\/p>\n<h3>A troubling dichotomy<\/h3>\n<p>Graphene has been exhaustively studied, perhaps more so than any material in history. Yet, after almost two decades of study, we are left with a troubling dichotomy: while graphene\u2019s properties are very much true, they are also grossly misleading. \u2018Pristine graphene\u2019 cannot be synthesised at any scale under real world conditions (at least not yet). Moreover, graphene has proved to be complicated and expensive to produce. Its technical and commercial potential, once thought of as unlimited, has led some people to think of it more as a fantasy. Indeed, the hype surrounding graphene has arguably led to more disappointment than hope.<\/p>\n<p>Of course, even a casual student of history could provide a laundry list of fervently held \u2018truths\u2019 that were proven to be not merely misleading, but rather completely wrong (e.g., the Earth is flat, the Sun revolves around the Earth, stress causes ulcers, and so on). <strong>This is not the case with graphene<\/strong>. Science has enabled us to identify and study graphene, and to understand its theoretical potential. Science alone cannot, however, enable us to realise that potential.<\/p>\n<p>We live in complex and chaotic times; not everything can be known or predicted. Yet over time, the order inherent in nature makes itself apparent, and the chaos usually pales in comparison when it does. Some men see this, but most do not. The careers of Adam Smith, Charles Darwin, and Albert Einstein clearly illustrate that while they could not always explain it perfectly, they understood the order found in nature better than most.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-15030 size-full\" src=\"https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2.jpg\" alt=\"\" width=\"1068\" height=\"580\" srcset=\"https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2.jpg 1068w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-300x163.jpg 300w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-1024x556.jpg 1024w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-768x417.jpg 768w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-696x378.jpg 696w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-100x54.jpg 100w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-200x109.jpg 200w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-400x217.jpg 400w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-800x434.jpg 800w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-2-773x420.jpg 773w\" sizes=\"(max-width: 1068px) 100vw, 1068px\" \/><\/p>\n<h3>Defining science<\/h3>\n<p>Richard Feynman was Einstein\u2019s prot\u00e9g\u00e9. In April 1966, Feynman delivered an address to the National Science Teachers Association, in which he suggested how students could be made to think like scientists \u2014 be open-minded, curious, and especially, to doubt. During the lecture, he gave a definition of science, which he said was derived from several stages. The evolution of intelligent life on planet Earth \u2013 creatures such as cats that play and learn from experience. The evolution of humans, who started using language to pass knowledge from one individual to the next, to preserve information for future generations.<\/p>\n<p>Of course, incorrect knowledge could be passed down just as easily as correct knowledge, so another step was needed. Galileo and others started doubting the truth of what was passed down and to investigate <em>ab initio<\/em>, from experience, what the true situation was \u2013 and thus science was born. Science, as defined by Feynman, allows us to see the order built within the Universe clearly \u2013 provided we are open-minded, curious, and willing to doubt what we know.<\/p>\n<h3>Plenty of room at the bottom<\/h3>\n<p>In December 1959 Feynman gave a speech to the American Physical Society entitled \u2018Plenty of Room at the Bottom.\u2019 Feynman himself described the focus of the talk as \u201cthe problem of manipulating and controlling things on a small scale.\u201d It is frequently cited as the birth of nanotechnology, and it still offers key insights into understanding the world around us \u2013 and it is exceptionally valuable when trying to understand graphene.<\/p>\n<p>During his presentation, Feynman said: \u201cI am not afraid to consider the final question as to whether, ultimately \u2013 in the great future \u2013 we can arrange the atoms the way we want\u2026 What would happen if we could arrange the atoms one by one the way we want them? (Within practical limits, you can\u2019t put them so that they are chemically unstable, for example).\u201d<\/p>\n<p><strong>What could we do with layered structures that have the right layers? What would the properties of materials be if we could really arrange the atoms the way we want them?<\/strong> They would be very interesting to investigate theoretically. I can\u2019t see exactly what would happen, but <strong>I can hardly doubt that when we have some control of the arrangement of things on a small scale, we will get an enormously greater range of things we can do, due to the possible properties that such substances can have.<\/strong><\/p>\n<p>\u201cAtoms on a small scale behave like nothing on a large scale, for they satisfy the laws of quantum mechanics. So, as we go down and fiddle around with the atoms down there, we are working with different laws, and we can expect to do different things.\u201d<\/p>\n<p>The material Feynman is describing is unquestionably graphene, although it is simply the first of many such nanomaterials. What this means is that the \u2018great future\u2019 Feynman envisioned has finally arrived. While this future is still in its infancy \u2013 as is graphene \u2013 we do have the ability to arrange atoms one by one the way we want them. The technology we use will be viewed as impossibly crude years from now, but we once sent a man to the Moon with technology more limited than what is found in a ubiquitous smart phone today.<\/p>\n<h3>General Graphene<\/h3>\n<p><a href=\"https:\/\/generalgraphenecorp.com\/\">General Graphene<\/a> was founded with the singular focus of unlocking graphene\u2019s potential, armed with a few obvious (but subtle) truths:<\/p>\n<ul>\n<li>The first step with any new material is developing the ability to effectively mass produce at lower cost. The term \u2018industrial scale\u2019 is synonymous with \u2018lower cost\u2019;<\/li>\n<li>Mass producing graphene is not a science problem; it is an engineering problem; and<\/li>\n<li>Graphene is not a \u2018one size fits all\u2019 material. Much like a metal alloy, its properties can be enhanced and altered flexibly to meet the demands of a given application, and pairing graphene with other materials often leads to extraordinary improvements in the properties of the latter.<\/li>\n<\/ul>\n<p>Graphene has long been the source of great confusion, because it comes in two chemically identical but fundamentally different varieties:<\/p>\n<ul>\n<li>\u2018Top down\u2019 graphene, which is from exfoliated graphite; and<\/li>\n<li>\u2018Bottom up\u2019 graphene, which is synthesised via chemical vapor deposition (CVD).<\/li>\n<\/ul>\n<p>Other forms of carbon, such as graphite and diamond, are also chemically identical, but no one has ever confused them. The two types of graphene are often categorised generically as the same, and both offer similar impressive properties, yet no one familiar with either would ever confuse them. Exfoliated graphite is a black powder, though often characterised as a \u2018sheet\u2019, each granule will usually measure less than a few microns. Conversely, CVD graphene is a transparent, continuous film which can be measured in square meters, although samples measuring 100 square centimetres are far more common.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-15031 size-full\" src=\"https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3.jpg\" alt=\"\" width=\"1920\" height=\"1080\" srcset=\"https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3.jpg 1920w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-300x169.jpg 300w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-1024x576.jpg 1024w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-768x432.jpg 768w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-1536x864.jpg 1536w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-696x392.jpg 696w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-1068x601.jpg 1068w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-100x56.jpg 100w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-200x113.jpg 200w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-400x225.jpg 400w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-800x450.jpg 800w, https:\/\/www.innovationnewsnetwork.com\/wp-content\/uploads\/2021\/10\/GENERAL1-27896-image-3-747x420.jpg 747w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/p>\n<h3>Obtaining graphene<\/h3>\n<p>It was well established about a decade ago that the highest quality graphene was obtained via CVD using a common laboratory \u2018tube furnace\u2019. The process is remarkably simple. The closed quartz tube serves as the reaction chamber. A catalytic metal substrate, normally copper or nickel foil, is placed in the tube and oxygen is purged to create an inert atmosphere, while the tube is heated to a very high temperature (&gt;1,000\u00b0C). A gaseous carbon (e.g., methane or CH4) is introduced in trace amounts (i.e., parts per million) and then dehydrogenated (the carbon separates from the hydrogen), finally depositing itself on the catalytic metal foil, forming a continuous graphene film.<\/p>\n<p>Unfortunately, the CVD process has historically been slow. Only small amounts of graphene can be produced given the size limitations of the quartz tube, each batch is a unique and isolated process and it is <em>very expensive<\/em>. In other words, graphene synthesised via traditional CVD is the antithesis of a modern industrial processes, which demand high production yields, consistently reproducible results, and low cost. Converting a batch process to a continuous production line was a formidable challenge, but as with most innovation, simplicity was the key.<\/p>\n<p>General Graphene was founded with the primary goal of converting CVD to an industrial scale process. As noted above, we recognised this was the only meaningful path to achieving lower costs with commercialisation demands. We now boast a patented, proprietary atmospheric CVD process capable of producing high volume, low cost, consistent and high-quality graphene sheets in a roll to roll structure. General Graphene is the only graphene manufacturer that does not use a quartz tube!<\/p>\n<p>Our process was demonstrated first on a modular pilot production machine with further design and refinement occurring specifically for scalability. Measuring more than 21m in length, our current production machine can produce a 300mm wide graphene film that can be tailored to any length (and may be easily scaled to much wider widths). We can run continuously, as our energy consumption is minimal at steady state. Our process inputs and outputs are virtually identical, with latter containing a trace amount of water vapor and CO<sub>2<\/sub>. We use no harsh chemicals and everything we produce is biodegradable or recyclable.<\/p>\n<h3>Driving innovation<\/h3>\n<p>As noted above, graphene is not a \u2018one size fits all\u2019 material. Our process allows us to tune the graphene to emphasise the properties necessary to fit the requirements of specific applications. We recognised that we bring only one-half of the solution to every application development project we undertake \u2013 we understand graphene, but our commercial partners understand their application. It is only through combined expertise that we can develop solutions that exploit all that graphene offers, leading to the next generation of products which graphene science has long promised. Application development is an iterative process that requires some patience but holds tremendous promise in helping us and others discover truly unique graphene solutions.<\/p>\n<p>General Graphene is fast, focused, and flexible, because we understand that combining cost and performance (rather than performance alone) is an essential synergy to drive innovation.<\/p>\n<p>If you are interested in unlocking graphene\u2019s potential with us, then consider giving us a call.<\/p>\n<p style=\"text-align: center;\"><strong><em>Please note, this article will also appear in the eighth edition of our\u00a0<\/em><\/strong><a href=\"https:\/\/www.innovationnewsnetwork.com\/the-innovation-platform\/\"><em><strong>quarterly publication<\/strong><\/em><\/a><strong><em>.<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A \u2018wonder material\u2019 trapped in the lab for almost two decades, graphene\u2019s potential has finally been unlocked with the production of cost effective, high-quality CVD graphene.<\/p>\n","protected":false},"author":13,"featured_media":15037,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[766,24429],"tags":[24250,833,24236,24231],"acf":[],"yoast_head":"\n<title>Low cost, industrial scale, high-quality CVD graphene production<\/title>\n<meta name=\"description\" content=\"&#039;Wonder material\u2019 graphene\u2019s potential has finally been unlocked with the production of cost effective, high-quality CVD graphene.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.innovationnewsnetwork.com\/low-cost-industrial-scale-high-quality-cvd-graphene-production\/15009\/\" 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