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Graphene

A rendering of the gallium/arsenic nanowires on the graphene substrate

Ordinarily, electronics are made with silicon semiconductors that are rigid, opaque, and about half a millimeter thick. Thanks to research being carried out at the Norwegian University of Science and Technology, however, that may be about to change. Led by Dr. Helge Weman and Prof. Bjørn-Ove Fimland, a team there has developed a method of making semiconductors out of graphene. At a thickness of just one micrometer, they are flexible and transparent. Also, because they require so little raw material, they should be considerably cheaper to manufacture than their silicon counterparts.  Read More

Structure of 2D molybdenum disulfide (Image: Wang et al. / MIT)

Imagine a world where rooms are lit by their walls, clothes are smartphones and windows turn into video screens. That may seem like a bit of science fiction, but not for long. Researchers at MIT are using a two-dimensional version of molybdenum disulfide (MoS2) to build electrical circuits that may soon revolutionize consumer electronics.  Read More

A scanning electron microscope image of the treated graphene oxide paper

While the lithium-ion batteries commonly used in electric cars are capable of storing a fairly large amount of energy, they’re not able to accept or discharge that energy very quickly. That’s why electric vehicles require supercapacitors, to speedily deliver energy when accelerating, or to store it when braking. Recently, however, researchers from New York’s Rensselaer Polytechnic Institute created a new anode material, that allows Li-ion batteries to charge and discharge ten times faster than those using regular graphite anodes. It could make EV supercapacitors unnecessary, and vastly shorten the charging time required by electronic devices.  Read More

Thomas Edison with his nickel-iron rechargeable battery in 1910 (Photo: Smithsonian)

A green, rechargeable battery that is suitable for powering electric vehicles and stationary power storage applications, and that would survive tens of thousands of charge cycles in a useful life of 100 years without loss of capacity. What could be a better innovation for our times? Such a battery has been developed, and recently improved by Stanford researchers. Oh, one other thing. The battery was invented by Thomas Edison in 1901.  Read More

Atomic force micrograph of the olympicene molecule

Chemistry isn't about to be left out of the buzz surrounding the upcoming 2012 Summer Olympics in London. British chemists have collaborated with IBM Research - Zurich to develop and image a molecule just 1.2 nanometers wide that looks like the five Olympic rings.  Read More

This drawing shows a double-walled carbon nanotube. Each tube is made of a rolled-up sheet...

Stanford researchers have found that concentric carbon nanotubes, with the outer layer riddled by defects and impurities, could be a cheap alternative for some of the platinum catalysts that convert hydrogen and oxygen into water in fuel cells and metal-air batteries.  Read More

A piece of steel treated with the graphene varnish, in front of an untreated sample

Hexavalent chromium compounds are a key ingredient in coatings used to rust-proof steel. They also happen to be carcinogenic. Researchers, therefore, have been looking for non-toxic alternatives that could be used to keep steel items from corroding. Recently, scientists from the University at Buffalo announced that they have developed such a substance. It’s a varnish that incorporates graphene, the one-atom-thick carbon sheeting material that is the thinnest and strongest substance known to exist.  Read More

A new efficiency record of 8.6 percent for graphene solar cells using graphene doped with ...

Doping graphene with trifluoromethanesulfonyl-amide (TFSA) has enabled researchers at the University of Florida (UF) to set a new efficiency record for graphene solar cells. While the record-breaking efficiency of 8.6 percent is well short of the efficiencies seen in other types of solar cells, it is a big improvement over previous graphene solar cells that saw efficiencies ranging up to 2.9 percent. The development provides hope for cheaper, durable graphene solar cells in the future.  Read More

By sandwiching a layer of ferric chloride molecules between two sheets of graphene (pictur...

Currently, virtually all touchscreen displays found in our electronic devices rely on a coating of indium tin oxide (ITO). It is used because of its electrical conductivity, its optical transparency, and the ease with which it can be deposited onto a display as a thin film. Using graphene, researchers at the University of Exeter have developed a viable alternative to increasingly expensive ITO that they claim is the “most transparent, lightweight and flexible material ever for conducting electricity.”  Read More

A graphene sensor effectively tattooed onto a tooth can be used to detect bacteria and so ...

A graphene sensor effectively tattooed onto a tooth can be used to detect bacteria and so wirelessly monitor oral health, research has shown. Graphene printed onto water-soluble silk can be "bio-transferred" onto organic materials such as tooth enamel. By incorporating antimicrobial peptides and a resonant coil, individual bacteria cells can be detected without need of an onboard power supply or wired connections.  Read More

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