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From: DanD3/11/2012 7:44:32 AM
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mPhase Technologies, Inc. Receives U.S. Patent For Battery System



Thursday, 20 Oct 2011 02:00pm EDT mPhase Technologies, Inc. announced that it has received patent no. 8,021,773 from the United States Patent Office for a battery system for efficiently operating a battery under various circumstances, such as relating to extreme temperature ranges and varying load (i.e. current) ranges. The battery system generally includes at least one first cell having a first chemistry, at least one second cell having a second chemistry and a controller in communication with the first cell and the second cell. The controller is adapted to employ a chemical reaction of the first chemistry in the first cell or the second chemistry in the second cell. The first chemistry is different than the second chemistry, wherein the first chemistry and the second chemistry may be adapted to provide current over varying temperature ranges or to provide current for varying current loads.

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From: DanD3/11/2012 7:45:16 AM
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mPhase Technologies looks to graphene for Smart NanoBattery.
Product Development

by Gary Hemmings



[iframe allowtransparency="true" frameborder="0" height="60" hspace="0" marginwidth="0" marginheight="0" scrolling="no" vspace="0" width="468" id="aswift_0" name="aswift_0" style="left: 0px; position: absolute; top: 0px; "][/iframe]
mPhase Technologies, Inc. (OTC.BB: XDSL.OB) said today that it is exploring the printing of its Smart NanoBattery with Graphene and other advanced new materials.

mPhase Technologies is introducing a revolutionary Smart Surface technology enabled by breakthroughs in nanotechnology, MEMS processing and microfluidics. Our Smart Surface technology has potential applications within drug delivery systems, lab-on-a-chip analytic systems, self-cleaning systems, liquid and chemical sensor systems, and filtration systems. mPhase has pioneered its first Smart Surface enabled product, the mPhase Smart NanoBattery.

The mPhase Smart NanoBattery uses nanotechnology to produce a battery in which the electrolyte only comes into contact with the reactive metal when the battery is in use. This innovation means that the battery lasts longer, is greener and more efficient than other designs. The Smart NanoBattery is expected to last for 15-20 years, and is expected to make a huge mark on the billion dollar battery market. NanoBatteries can be placed on single chips and use the hydrophobic properties of the nanostructures to produce high power and energy density.

In addition to the Smart Surface technology, mPhase recently introduced its first product, the mPower Emergency Illuminator, an award-winning product designed by Porsche Design Studio and sold via the mPower website: mpowertech.com. 

mPhase Technologies develops and commercializes next-generation solutions for telecommunications and nanotechnology applications. The address to both markets takes advantage of a broad partnership with Lucent Technologies including Bell Laboratories and Lucent World Wide Services.

COMPANY HISTORY

mPhase Technologies Inc. is an inventive and innovative development company specializing in microfluidics, microelectromechanical systems (MEMS) and nanotechnology. A public company trading uder the stock symbol OTC BB: XDSL, mPhase was founded in October 1996 as a spin-off of Microphase Corporation, a leader in RF component technologies since 1995, and is headquartered in Little Falls, New Jersey with additional offices in Norwalk, Connecticut, and New York City.

In 2004, mPhase Technologies collaborated with the renowned Bell Laboratories to develop a new technology called the Smart NanoBattery that has the potential to revolutionize the battery industry. This well-patented technology is based on a phenomenon known as electrowetting that provides a unique way to activate the battery to gain access to energy stored and manage power. The platform technology behind the Smart NanoBattery is a porous nanostructured componet that repels and precisely controls the flow of certain liquids.

Recently , through its wholly owned subsidary Always Ready, Inc., mPhase has focoused on development of a lithium Smart NanoBattery. Working closely with other development companies and the Energy Storage Research Group at Rutgers University, mPhase introduced the first version of the lithium Smart NanoBattery Designed for portable electronic and microelectronic applications. One Version of the lithium battery based on a breakable separator is being developed for emergency flashlight applications.

mPhase welcomes collaborations with other companies and organizations and is actively seeking partners interested in using the Smart NanoBattery or its platform technology for power systems or other applications.

[iframe width="420" height="315" src="http://www.youtube.com/embed/P8UwBP4yVgM" frameborder="0" allowfullscreen=""][/iframe]

Forward-Looking Statements

As a cautionary note to investors, certain matters discussed in this press release may be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such matters involve risks and uncertainties that may cause actual results to differ materially, including the following: changes in economic conditions; general competitive factors; acceptance of the Company’s products in the market; the Company’s success in technology and product development; the Company’s ability to execute its business model and strategic plans; and all the risks and related information described from time to time in the Company’s SEC filings, including the financial statements and related information contained in the Company’s SEC Filing. mPhase assumes no obligation to update the information in this release.

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From: FUBHO3/14/2012 2:27:00 PM
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Molecular graphene heralds new era of 'designer electrons'

March 14, 2012

physorg.com 

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From: DanD3/27/2012 1:39:39 PM
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Researchers find simple and cheap way to mass-produce graphene nanosheetsMarch 26th, 2012 in Nanotechnology / Nanomaterials
Enlarge




Made of a single sheet of carbon atoms, graphene can be spun at the fastest rate of any known macroscopic object. Image credit: Wikimedia Commons.



Mixing a little dry ice and a simple industrial process cheaply mass-produces high-quality graphene nanosheets, researchers in South Korea and Case Western Reserve University report.

Graphene, which is made from graphite, the same stuff as "lead" in pencils, has been hailed as the most important synthetic material in a century. Sheets conduct electricity better than copper, heat better than any material known, are harder than diamonds yet stretch.

Scientists worldwide speculate graphene will revolutionize computing, electronics and medicine but the inability to mass-produce sheets has blocked widespread use.

A description of the new research will be published the week of March 26 in the online Early Edition of the Proceedings of the National Academy of Sciences.

Jong-Beom Baek, professor and director of the Interdisciplinary School of Green Energy/Advanced Materials & Devices, Ulsan National Institute of Science and Technology, Ulsan, South Korea, led the effort.

"We have developed a low-cost, easier way to mass produce better graphene sheets than the current, widely-used method of acid oxidation, which requires the tedious application of toxic chemicals," said Liming Dai, professor of macromolecular science and engineering at Case Western Reserve and a co-author of the paper.

Here's how:

Researchers placed graphite and frozen carbon dioxide in a ball miller, which is a canister filled with stainless steel balls. The canister was turned for two days and the mechanical force produced flakes of graphite with edges essentially opened up to chemical interaction by carboxylic acid formed during the milling.

The carboxylated edges make the graphite soluble in a class of solvents called protic solvents, which include water and methanol, and another class called polar aprotic solvents, which includes dimethyl sulfoxide.

Once dispersed in a solvent, the flakes separate into graphene naonsheets of five or fewer layers.

To test whether the material would work in direct formation of molded objects for electronic applications, samples were compressed into pellets. In a comparison, these pellets were 688 times better at conducting electricity than pellets yielded from the acid oxidation of graphite.

After heating the pellets at 900 degrees Celsius for two hours, the edges of the ball-mill–derived sheets were decarboxylated, that is, the edges of the nanosheets became linked with strong hydrogen bonding to neighboring sheets, remaining cohesive. The compressed acid-oxidation pellet shattered during heating.

To form large-area graphene nanosheet films, a solution of solvent and the edge-carboxylated graphene nanosheets was cast on silicon wafers 3.5 centimeters by 5 centimeters, and heated to 900 degrees Celsius. Again, the heat decarboxylated the edges, which then bonded with edges of neighboring pieces. The researchers say this process is limited only by the size of the wafer. The electrical conductivity of the resultant large-area films, even at a high optical transmittance, was still much higher than that of their counterparts from the acid oxidation.

By using ammonia or sulfur trioxide as substitutes for dry ice and by using different solvents, "you can customize the edges for different applications," Baek said. "You can customize for electronics, supercapacitors, metal-free catalysts to replace platinum in fuel cells. You can customize the edges to assemble in two-dimensional and three-dimensional structures."

Provided by Case Western Reserve University



"Researchers find simple and cheap way to mass-produce graphene nanosheets." March 26th, 2012. physorg.com 

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From: FUBHO3/28/2012 10:53:07 AM
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Graphene is already being talked about as a potential replacement to silicon, but certain problems have to be negotiated around if the wonder material is to power a future generation of chips.

There are various barriers to the commercialisation of graphene - for example, band gap problems - meaning that circuit production from one atom thick sheets is still a while away.

Another problem is how to reliably manufacture the material on a large scale without damaging graphene’s ‘wonder’ properties.

A team of researchers at the University of Florida has developed a new technique that stops the thermal ‘etching’ process in circuit production from affecting the graphene.

Creating graphene patterns on top of sheets of silicon carbide at high temperatures of 1,300 Celcius, the team was able to vaporise the silicon. This left just carbon, which is then able to grow into pure graphene.

Usually an etching process would be used, but this can introduce defects or chemical contaminants which can reduce graphene’s electron mobility – one of its prime qualities.

The team's technique meant that it could grow tiny areas of graphene with great accuracy. Furthermore, by implanting gold or silicon ions, the team was able to drop the temperature at which grapheen formed by 100 degrees.

This meant then were able to ‘draw’ on the implanted ions wherever they wanted, before increasing the heat to 1,200 Celcius. In turn, the rest of the silicon carbide remained the same, while the ‘ion pen’ markings formed the graphene circuitry.



Read more: news.techeye.net 

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From: DanD3/30/2012 11:06:32 AM
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Novel Memory Chips Made of Graphene Materials



March 30, 2012 (Source: AzoNano) -- A research team led by James M. Tour has developed new, flexible, transparent memory chips for the electronics industry.

The chips can be easily folded like a paper and can withstand 1,000°F and other aggressive conditions. They can be used in the development of innovative memory devices for use in computers, cell phones and keychain drives. Tour has demonstrated the novel memory chips at the American Chemical Society’s 243rd National Meeting & Exposition.

The chips feature a unique three-dimensional (3-D) internal architecture, which enables the storage of additional gigabytes of data in less space. The 3-D memory chips include a layer of graphene material over silicon oxide, which acts as an insulator in electronic products. Graphene is the strongest and thinnest material made of a layer of carbon atoms. Rice University researchers assumed that the graphene contributes to the remarkable memory capacity of the chips. Later, they found out that it was the silicon oxide surface that was responsible for creating the memories. The chips are ideal alternatives to flash memory devices.

The graphene-based chips can be used in various applications, including spacecraft and military. The chips have been embedded in the latest Russian Progress 44 cargo spacecraft project in 2011. However, the spaceship crashed over Siberia. Tour’s team is hoping to send the chips on a space mission planned in July 2012 in order to observe the capability of the memory in the high-radiation environment.

Touch screens that are presently available are made from glass and indium tin oxide, which are fragile and easily breakable. Therefore, plastic made of the new memory chips can be an ideal replacement for them. Tour is currently discussing with manufacturers to implant the chips into electronic products.



Posted by Gregory Beard at 10:05:53 AM in Press

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From: DanD3/30/2012 11:14:04 AM
   of 156
 
Graphite Considered A Top Prospect.
Market Reports

by Gary Hemmings


March 29, 2012 (Investorideas.com Mining Stocks Newswire) – With so many moving variables in the rare earth space, how can investors evaluate investment opportunities? Siddharth Rajeev of Fundamental Research Corp. finds his top prospects by zeroing in on a specific material and tracking its growth drivers. Rajeev argues that critical materials used in viable new technologies will see increasing demand. In this exclusive interview with The Critical Metals Report, he explains how lithium-ion battery development and the forthcoming WTO ruling effect his outlook for graphite and niobium.

The Critical Metals Report: China recently announced it is maintaining its rare earth export quotas of 31,130 metric tons (t), but the U.S., the EU and Japan filed a claim at the World Trade Organization (WTO), saying that the restrictions are illegal. What will this controversy mean for rare earth prices?

Siddharth Rajeev: One of the main reasons for the run-up in rare earth prices is the export quotas set by China, which controls 97–98% of the supply. End users started looking for alternatives to rare earths, which is resulting in lower demand. As for the WTO case regarding China’s export quotas, Chinese officials think they are in line with WTO regulations. The WTO had previously ruled against China for restricting exports of bauxite, magnesium, zinc, etc., so it is possible the WTO might go against China here as well, which would negatively impact rare earth prices. In addition, companies outside China now nearing production, including Molycorp Inc. (MCP:NYSE), Great Western Minerals Group Ltd. (GWG:TSX.V; GWMGF:OTCQX) in South Africa and Australia’s Lynas Corp. (LYC:ASX), may alleviate supply constraints, thus driving prices down. Still more projects are expected to come online in the next two years, which would further add to supply.

TCMR: When do you expect the WTO to decide on a ruling?

SR: It’s going to be a long process, but it’s something that could potentially affect long-term rather than short-term prices.

TCMR: Because rare earth materials are so varied, you use a fair-value metric instead of target prices when you evaluate these stocks. But how do you determine the intrinsic value of a critical metal stock when there is all of this uncertainty?

SR: Every commodity is priced based on expected long-term demand and supply. To forecast commodity prices, we project long-term demand based on the potential growth of the major demand drivers. Supply is projected based on the projects that may come onstream over the next 10 years. But as you mentioned, the forecast demand for critical elements is harder than, say, forecasting demand for copper or zinc. Demand for critical elements can be a moving target. We mitigate this problem by constantly updating our models to capture this variable. For example, major lithium demand drivers are expected to be lithium-ion batteries. Precisely forecasting demand for lithium-ion batteries depends on other growth drivers, such as electric vehicle proliferation. So we constantly update our models as to reflect projected demand in related sectors. That’s how we calculate price forecasts for all the commodities in the rare earth and critical metals space.

TCMR: You recently released a report on graphite and its uses for everything from brake linings to batteries and nuclear power. Graphite prices have jumped as much as $500/t in the last year for certain grades. How high could that price go, and what’s driving that?

SR: Over the long term, we are bullish on graphite. The main reasons are the following: First, we think the main demand growth drivers of graphite could be new applications, such as lithium-ion batteries, fuel cells and nuclear power. Natural graphite might take away a significant market share from the synthetic graphite market, because high-purity, high-grade graphite is required for these technological developments. Synthetic graphite currently trades at four to six times the price of natural graphite.

Second, on the supply side, China accounts for more than 70% of production. The U.S. imports its entire graphite consumption. So, again, we are seeing a highly concentrated supply in one area. Another thing, the blue-sky potential for graphite involves a product called graphene, which is made by chemically processing graphite. Graphene is very unique because it’s highly flexible, like rubber, yet stronger than steel, and it’s a very good conductor of heat, 10 times more effective than copper. It’s a recent technology and there is a lot of research going on in the sector. All things considered, we have a bullish outlook on graphite.

TCMR: What companies outside of China are you watching in this space?

SR: We’ll be initiating coverage on Focus Metals Inc. (FMS:TSX.V) in the next month or so. Its project, which it acquired from IAMGOLD Corp. (IMG:TSX; IAG:NYSE) in 2010, is located in Quebec. I have not seen any other project with such high grades of graphite in the deposit. Focus Metals has a grade of 16%, whereas most of the graphite deposits out there are less than 3%. It has large-flake material, which is highly in demand for applications such as lithium-ion batteries. Focus Metals recently completed a resource estimate. It’s working on a scoping study now. It’s a low-capital expenditure project, less than $75 million (M). The company has an extremely strong cash position, $16M. Market cap is just over $80M.

Another story we like is Flinders Resources Ltd. (FDR:TSX.V), a brand-new company. It started trading on the Toronto Stock Exchange Venture a few weeks ago. Its project is the Kringel project. A lot of historic work has been done on the project. It has a historical resource of 7 million tons (Mt) at 9% graphite, which is a high-grade material. It has a lot of catalysts coming up over the next 12 months, one of the biggest being its plans to convert the historic resource to an NI 43-101-compliant resource. It has a fully permitted mine that can be put into production in the next 18–24 months. It has a strong cash position of $5M, and its market cap is $60M.

Another company is Lomiko Metals Inc. (LMR:TSX.V). It’s a very early-stage project. It just acquired a project in Quebec. Some historic work has been done on the property. As for near-term catalysts, it is working on an NI 43-101 technical report [released 3/27/12], and it is going to commence an exploration program on the property.

TCMR: Lomiko is historically a gold company that just diversified into the graphite space. Is that common? Are a lot of companies following suit?

SR: Because of graphite’s highly attractive fundamentals and growing investor interest, we have been seeing a lot of new companies pop up or switch their focus to graphite, which is normal in the commodities sector. We saw the same pattern a few years ago when the rare earth boom started. The same has been the case with lithium. This is common, but bear in mind that a lot of companies might not survive the boom period.

TCMR: Do you see Lomiko’s stock going up because of the diversification?

SR: Our last report on Lomiko’s graphite came out a few months ago. The stock had doubled since the initial report. It’s dropped since then. As long as the graphite market stays in its current space, where I expect it to stay for a while, and if Lomiko’s exploration program produces positive results, that should reflect in the stock price. In other words, it’s too early to tell.

TCMR: You also focus on niobium, which is used in the technology, aviation and steel industries to make metals lighter and stronger. The price for ferro-niobium has come down from more than $46/kilogram (kg) to about $43. Is that a function of more supply or less demand?

SR: Niobium demand is highly correlated with steel demand, and steel demand is highly correlated with global gross domestic product (GDP) growth. The recent slowdown in global GDP growth, especially from China, has resulted in a softening of prices for commodities that service the steel industry.

TCMR: How does that price action affect your outlook for niobium suppliers, particularly in North America?

SR: The U.S. produces very little niobium. That’s been the case for a long time. Brazil is the number-one producer of niobium, accounting for about 92% of global production. Canada comes in a far second. We cover two North American companies in the space. The first is Quantum Rare Earth Developments Corp. (QRE:TSX.V; BR3:FSE; QREDF:OTCBB). It has the Elk Creek project in Nebraska, of which it owns 100%. In March 2011, it came up with an Inferred resource of 80 Mt at 0.62% niobium oxide, which is a significant deposit. This company has quite a few catalysts expected this year. In Q112, it expects a new NI 43-101 resource report, and in Q212 it expects some results of its metallurgical testing. These two numbers should give it enough information to commence a preliminary economic assessment (PEA) later this year.

TCMR: If those reports come out positive, could that override any niobium price challenges?

SR: Definitely.

TCMR: What other companies do you follow in that space?

SR: Another company is Commerce Resources Corp. (CCE:TSX.V; D7H:FSE; CMRZF:OTCQX). It has the Tantalum niobium project in British Columbia. It recently completed a PEA of the property, but its main asset now is its rare earth project in Quebec, which has produced a lot of positive news for the last 6 to 12 months. It recently came out with a huge increase in its resource estimate, and its initial estimate was one of the largest outside of China. The newer resource has doubled the figures, so that’s a significant development. It identified middle rare earths (MREEs) and heavy rare earths (HREEs), which are more valuable than light rare earths (LREEs),close to the surface of the property.

TCMR: Are the price dynamics different for HREEs and LREEs due to respective export quotas?

SR: Yes, exactly. Prices of light and abundant rare earths dropped much more than other rare earths that are more scarcely available. So there’s been a wide fluctuation, and different commodities in the rare earth sector have reacted differently. But overall, the rare earth market has been hit significantly in the last 6 to 12 months.

TCMR: Commerce has, as you mentioned, both MREEs and HREEs. Do you expect those prices to remain high or perhaps escalate?

SR: Overall, we saw significant price increases in the rare earth market, increasing as much as five- or tenfold in some cases over the last few years. We’ve since seen sort of a correction. But even at these relatively lower prices, a lot of projects are economic. So we wouldn’t need to see an increase in prices to make these companies look favorable.

TCMR: What other factors might impact this sector, particularly in an election year, that investors should take into consideration when considering critical metals companies?

SR: Global economic growth and price levels of critical metals are not directly linked. Critical metals are more influenced by new technologies. Any commodity that can be used for viable and efficient new technologies is going to see good growth and demand. This would include commodities like lithium and graphite, which are used in lithium-ion batteries. We have a strong outlook on lithium-ion batteries for electric cars. Those are the kinds of technologies that can be viable in the long run, and all the associated technologies are likewise going to see a significant increase in demand. Critical materials that figure into these developments will be less affected by shorter-term developments like the U.S. presidential election or a slowdown in the Chinese economy because many of these new technologies have a lot of room for upside, even before demand stabilizes.

TCMR: Thank you for speaking with us today.

SR: My pleasure.

Siddharth Rajeev is vice president and head of research at Fundamental Research Corp., the largest independent equity research firm in Canada. He holds a bachelor of technology in electronics engineering from the Cochin University of Science & Technology and a Masters of Business Administration in finance from the University of British Columbia. He is also a CFA charter holder. He is ranked as a four-star analyst in the energyand mining sectors by Deutsche Asset Management.

Want to read more exclusive Critical Metals Report articles like this? Sign up for our free e-newsletter, and you’ll learn when new articles have been published. To see a list of recent interviews with industry analysts and commentators and learn more about critical metals companies, visit our Critical Metals Report page.

DISCLOSURE:

1) JT Long of The Critical Metals Report conducted this interview. She personally and/or her family own shares of the following companies mentioned in this interview: None.
2) The following companies mentioned in the interview are sponsors of The Critical Metals Report: Focus Metals Inc., Lomiko Metals Inc., Quantum Rare Earth Developments Corp. and Commerce Resources Corp. Streetwise Reports does not accept stock in exchange for services.
3) Siddharth Rajeev: I personally and/or my family own shares of the following companies mentioned in this interview: None. I personally and/or my family am paid by the following companies mentioned in this interview: None. I was not paid to do this interview. FRC has been paid by some companies mentioned in this article to initiate coverage.

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From: DanD3/30/2012 1:21:54 PM
   of 156
 
Researchers Argue Over "First" Atom-Thick Silicon SheetsMarch 30, 2012




Image of the two-dimensional honeycomb structure of silicene as captured by a scanning tunneling microscope. Image: Guy Le Lay et al./TU Berlin
Since its discovery in 2004, graphene — sheets of carbon an atom thick — has sparked a flurry of research into the nanomaterial's potential applications for blazing fast, tiny electronics. Now, several research groups claim to have created analogous thin sheets of silicon called silicene, igniting a controversy over who won the race to synthesize this promising new material.

Smaller means faster in electronics. Conventional electronic devices based on silicon are being miniaturized, but they start to malfunction as they approach the limits of the single atom scale. Consequently, manufacturers need to find new solutions for faster electronics in the coming years. Because silicene and graphene are essentially two-dimensional they can work at the single atom level.

"This is why silicene is so important. It might take you to that ultimate [size] limit," says Lok Lew Yan Voon, a nanomaterial expert from Wright State Univ. in Ohio who coined the term "silicene" in 2007.

According to Lew Yan Voon, electronic devices based on silicene could reliably exhibit the critical on-off function required for transistors, the building blocks of computers. Graphene, however, has struggled to achieve this function, stymieing its practical use as a transistor.

"The electronics industry is fighting against carbon," says Guy Le Lay, a silicene researcher from Aix-Marseille Univ. in France. "To change to graphene, in principle, would be very nice, but it's very complicated."

Because electronics manufacturers have built an infrastructure around silicon, they remain hesitant to fully embrace graphene as the basis for future super-fast processors. Silicene, however, presents an attractive prospect, according to its proponents.

In a forthcoming research paper, Le Lay and his colleagues claim to be the first group to have clear proof of synthesized silicene sheets. The work will appear in Physical Review Letters.

Le Lay hopes that this research will segue into transistors soon.

"The aim is to have a demonstration of a device in two and a half years," says Le Lay.

The advantage silicene transistors would have over their graphene counterparts stems from silicene's unique structure. In silicene, a few silicon atoms exist above and below the main two-dimensional surface and electrons in these two regions have distinct energies. Applying electrical voltages enables electrons to jump across this energy gap and allows silicene to transition between an "on" and "off" state.

Le Lay's team claims to have created the first sheets that pave the way for such applications. But Le Lay and his colleagues have several competitors.

Research groups from China and Japan recently unveiled similar results, and another team announced the synthesis of silicene in an Applied Physics Letters paper published in late 2010. The latter group, however, didn't have enough proof to make that claim, says Le Lay. Le Lay added that the Japanese group does not have as much evidence as his group.

"[Le Lay] wants to own the fatherhood of silicene like it's his thing, but actually it's not," says Abdelkader Kara, a theoretical physicist specializing in silicene at the Univ. of Central Florida in Orlando and coauthor of the 2010 research paper.

Although Kara's group claimed to have synthesized silicene in 2010, they only used one detection method to prove their claim: scanning tunneling microscope images. The device relies on quantum-mechanical effects to produce images on the atomic scale, with greater detail than images from traditional microscopes.

Such images, however, can be deceiving. According to the French team behind the newer research, the 2010 results didn't conclusively indicate that silicene was formed. Instead, something subtle was cropping up in the images, Le Lay's group claims.

Most silicene researchers have been attempting to grow silicene on top of silver because silver atoms and silicon atoms don't interact strongly. While this allows the silicene to form independently from the silver substrate, it can be difficult to differentiate between genuine silicene sheets and silver structures, says Le Lay.

"There's something tricky with the silver surface. The silver surface can mimic the honeycomb surface that looks like silicene," says Patrick Vogt, a silicene researcher at Technical Univ. of Berlin and lead author of the forthcoming research done with Guy Le Lay. "The real silicene structure looks different."

Kara counters that they had sufficient proof for silicene synthesis back in 2010 based on how the silicon atoms aligned themselves at an angle with the silver substrate. The microscope images revealed a honeycomb structure that the silver surface could not have formed alone, says Kara.

"[Scanning tunneling microscope] images of course can be deceiving," says Kara. "We did a very careful job of looking at the silicon, and that's why the paper was accepted [for scientific publication]."

Nonetheless, Le Lay and Vogt weren't satisfied. To ensure that they had truly created silicene, Vogt's research group analyzed their sample in a number of ways. They measured electrical and chemical properties in addition to comparing actual images with simulated theoretical predictions. Proving the synthesis of silicene requires converging evidence from these different sources, says Le Lay.

Also, the team found that the observed distance between the silicon atoms matched theoretical predictions better than the results from 2010.

Kara agrees that Le Lay's team took an important step forward in silicene research, but he believes that they don't deserve too much credit for silicene's discovery.

Kara added that the credit for pioneering experimental silicene research should go to his colleagues, Bernard Aufray and Hamid Oughaddou, who worked on the 2010 paper.

Wright State's Lew Yan Voon, who wasn't affiliated with either Kara's or Le Lay's research, acknowledges that there were some discrepancies between the 2010 paper and theoretical predictions. Consequently, it remains unclear who synthesized silicene first, says Lew Yan Voon.

"The positive note is that more and more groups are reporting [synthesis of silicene]," says Lew Yan Voon. "There was a time when people said you couldn't even create it."

Despite the uncertainty over who created silicene first, researchers agree what needs to be done next. To take full advantage of silicene's properties, physicists need to grow it on an insulating material that won't conduct electricity like silver. Once silicene can be grown on an insulator, it will be much easier to develop silicene transistors and other devices.

Scientists may develop silicene devices that dramatically increase processing speed relatively soon, but large challenges remain, according to Le Lay.

"From this to applications is another big step. It's not trivial," says Le Lay.

Source: Inside Science News Service, Brian Jacobsmeyer

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From: DanD5/15/2012 9:54:20 PM
   of 156
 

Graphene Is Going To Grow: A Few Companies To Make You Some Money

May 8, 2012 | 10 comments | includes: AIXG, CHGI.OB, CVV, GTI

Another new material that will help with a new generation of smart phones, tablets, and other electronic devices is graphene. Two British scientists won the Nobel Prize for their work on the new material. Graphene is extremely thin, in fact the thinnest transistor currently known to the world. It is also flexible and extremely tough for its thinness.

As the technology continues to be refined and graphene becomes accepted, it will be in extremely high demand for flexible technology and other uses.. In addition to displays, graphene is said to be able to make solar panels affordable for the average consumer. Companies that manufacture and supply graphene stand to grow quite a bit and are ripe for investment. There are many companies that deal with graphene, and many more continue to start up; many are still privately held. I found six that are publicly traded and will let you know which ones can make us money and which ones to avoid.

CVD Equipment Corporation ( CVV):CVD has a market cap of about $85 million and is not a pure graphene play. It has a strong balance sheet with $18 million in cash compared to only $3 million in debt. Its First Nano division is the one that handles the graphene. According to its most recent 10-K CVD had a backlog of $16.2 million versus $9.9 million at the end of 2010. Revenues were up 90.6% in 2011 largely fueled by the First Nano division which grew 107.5%. CVD reports first quarter earnings on next week on the 7th. I look for revenues to be slightly lower near $8 million for the quarter as CVD is in the process of moving to a new larger facility. While revenues will be lower for this quarter, I look for them to pick up substantially for the year as capacity is increased and CVD products continue to penetrate across the globe. The stock is trading at 45% above its 52 week low and a prime buy right now. I look for $20/share for 2012 and $28/share by the end of 2013 as demand and applications for this technology continue to grow.

Aixtron SE ( AIXG):Aixtron has a market cap just over $1 billion. It is also not a pure play on graphene. Aixtron had a very rough 2011 with revenues dropping 22% and profits dropping 44%. LED is its largest segment and brought in 83% of 2010 revenues. It reports these drops are related to reduced orders and demand for LED products globally. A large focus of Aixtron is LED lighting, the market for which is growing slowly because of the high initial cost of the lighting. In that same report it also predicts a rough first two quarters of 2012 and possibly another rough year.

The biggest thing Aixtron has going for it is the balance sheet with $382.8 million in cash and no debt. The stock is battered from the terrible 2011 performance and is only slowly regaining price. It currently trades at a P/E of 97 and people appear to be buying on the hopes Aixtron will see its turnaround in the second half of this year. While I like the LED light technology and know it's the way of the future, it is just too expensive right now for the depressed global economy. I'm going to keep watching this one because it has lots of potential; I need to see another quarter or two within its guidance first.

GrafTech International Ltd. ( GTI):GrafTech is a pure graphite play, but it doesn't yet have lots of products listed on its website involving graphene. GrafTech also had a rough 2011. For its first quarter of 2012 sales were down 21% versus the first quarter of 2011 according to its earnings release. The decrease was largely due to a decrease in the steel industry. In a press release from 2010 it talks about a thin and flexible graphite product for cell phones and other electronics, but it doesn't specifically call it graphene. It also has a current job posting for a graphene scientist focused on solar, semiconductor, energy, and transportation applications using graphene. Since GrafTech is a leader in graphite, it stands to reason that expertise would give it an advantage with graphene.

Its balance sheet looks bad, with only $12.8 million in cash and $443.2 million in long term debt. The debt increase was to help fund working capital and CapEx expenditures, according to its latest conference call. Those expenditures are going to grow its engineered solutions business. GrafTech is also carrying $555 million in inventory. Of that less than 20% is finished goods; the rest is raw materials or work in progress to meet an anticipated increase in customer demand. With $240 million in sales last quarter, the current inventories will only last two or three quarters.

I like the position GrafTech is in because of the growth potential. It currently trades at only 11 times earnings, which is low for a company working with this revolutionary material. While the steel industry may be declining, GrafTech is looking towards next generation uses for its materials and seeking to grow its engineered solutions segment (which is where graphene is located). It will be a slow growth process as the global economy recovers, but I think that leaves a great buying opportunity at current prices, and the ability to add if the stock drops from here.

China Carbon Graphite Group, Inc ( CHGI.OB): The current share price under $1.00 raises a flag from the start. According to its recent 10-K the picture becomes even bleaker. While the ability to acquire and carry debt is more of a status symbol in southwest Asia than it is in America, it carries $45.5 million in short term loans and another $16.8 million in long term notes, with only $500K in cash on the books. In the report it also notes that it isn't paying off any of these loans, but simply rolling them over as they come due. Even with the $12 million it has in restricted cash, it still doesn't have nearly enough to pay the short term loans if the lenders should come calling. Given the current economic state, that is a huge concern.

On the positive side, sales increased nearly 61% for 2011 over 2010. But that is about it; its interest expense increased over 100% from 2010 and as a result more loans had to be taken to make advanced payments to suppliers. Could China Carbon Graphite Group be a sleeper that becomes a huge growth story? The down side of less than $1/share compared to a 52 week high that is a triple from current levels is surely exciting. But at this point, other companies in this article are much safer plays with double and triple potential.

While I think all the companies but China Carbon are quality investments at this point, GrafTech is going to give the best exposure and growth from Graphene. This is definitely a material and market to keep an eye on as it stands to change portable electronics as we know them. And once the technology is proven, I imagine it will be in pretty high demand giving many of these and the private companies lots of growth opportunity. I also like the ability for it to be used to lower the costs of solar power panels and think the lower prices could drive an increase in demand fueling additional growth for graphene. Regardless of the exact use, this material is a great development for investors that get in early.

Disclosure:I have no positions in any stocks mentioned, but may initiate a long position in GTI, CVV over the next 72 hours.

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From: DanD5/25/2012 7:28:50 PM
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New record for graphene solar cell efficiency set

newkerala.com 

Washington, May 25 : University of Florida physicists have set a new record by creating a new graphene solar cell with unprecedented power-converting capabilities.

Graphene solar cells are one of industry's great hopes for cheaper, durable solar power cells in the future.

But previous attempts to use graphene, a single-atom-thick honeycomb lattice of carbon atoms, in solar cells have only managed power conversion efficiencies ranging up to 2.9 percent.

The UF team was able to achieve the record breaking 8.6 percent efficiency with their device by chemically treating, or doping, the graphene with trifluoromethanesulfonyl-amide, or TFSA.

'The dopant makes the graphene film more conductive and increases the electric field potential inside the cell,' said Xiaochang Miao, a graduate student in the physics department.

That makes it more efficient at converting sunlight into electricity. And unlike other dopants that have been tried in the past, TFSA is stable ' its effects are long lasting.

The solar cell that Miao and her co-workers created in the lab looks like a 5-mm-square window framed in gold. The window, a wafer of silicon coated with a monolayer of graphene, is where the magic happens.]

Graphene and silicon, when they come together, form what is called a Schottky junction ' a one-way street for electrons that when illuminated with light, acts as the power conversion zone for an entire class of solar cells.

Schottky junctions are commonly formed by layering a metal on top of a semiconductor. But researchers at the UF Nanoscience Institute for Medical and Engineering Technologies discovered in 2011 that graphene, a semi-metal, made a suitable substitute for metal in creating the junction.

'Graphene, unlike conventional metals, is transparent and flexible, so it has great potential to be an important component in the kind of solar cells we hope to see incorporated into building exteriors and other materials in the future,' said Arthur Hebard, distinguished professor of physics at UF and co-author on the paper.

'Showing that its power-converting capabilities can be enhanced by such a simple, inexpensive treatment bodes well for its future,' he added.

The researchers said that if graphene solar cells reach 10 percent power conversion efficiency they could be a contender in the market place, if production costs are kept low enough.

The prototype solar cell created in the UF lab was built on a rigid base of silicon, which is not considered an economical material for mass production. But Hebard said that he sees real possibilities for combining the use of doped graphene with less expensive, more flexible substrates like the polymer sheets currently under development in research laboratories around the world.

Their results have been published in the current online edition of Nano Letters. (ANI)

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