Tag Archives: graphene

A new twist for graphene: Trying to solve the bandgap problem

Although it’s like a sheet of paper (if paper could be only one atom thick), but “Do not bend, fold, mutilate or spindle” does not apply to sheets of graphene. Scientists all over the world are doing all of the above and a lot more to graphene in search of its many surprising properties. From […]
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Tuning for terahertz waves with graphene

As you may already know if you follow science and technology even a little, graphene is a wonder substance. It’s a cousin of graphite, the stuff in ‘lead’ pencils, which is to say pure carbon. It’s growing array of properties are generally a result of two things: Graphene is a layer of carbon only one […]
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Plasmonic nanostructures make graphene viable for super-fast communications

On the one hand graphene, a single layer of carbon atoms in a honeycomb pattern, can move electrons (electricity) very fast and efficiently. On the other hand graphene is lousy at absorbing energy, specifically from sunlight; only about 3% is absorbed. Sounds like graphene, a wonder material in many accounts, isn’t cut out for solar […]
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Graphene ICs: IBM builds graphene transistors into a circuit

About one week before IBM celebrated its 100th year, IBM researchers published in the journal Science [10 June 2011, paywalled, Wafer-Scale Graphene Integrated Circuit] and publicly announced the design of a high speed graphene circuit. Since there are announcements about this or that new application of graphene just about every week, it would be easy […]
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Graphene transistor: Two layers may be better than one

One of the characteristics of clever science is to look at a new material from every which way. So it is with graphene. Graphene is a sheet of carbon atoms, in a layer one atom thick, arranged in the pattern of a honeycomb. It sounds simple, and is anything but. Its super-thinness in this precise […]
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Graphene gets spintronics

The basis of microelectronics is the manipulation of charged electrons. The basis of spintronics is the conversion of electricity to magnetism and vice versa in order to manipulate the spin of electrons. Both approaches can produce transistors and other elements used in electronics (computers et al), but spintronics has advantages: Unlike the charge of electrons, […]
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Graphene spintronics: Studies show promise

If you’ve had any contact with the concept of ‘digital devices’ (as in theory of, not the use of) you’ve heard it explained like ‘switches’ (i.e. gates) that are either ON or OFF, zeroes or ones – the binary code – that sort of thing. Information is stored or processed based on a sequence of […]
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Another graphene application – supercapacitors

While everybody knows about batteries, supercapacitors seem like a well kept secret. The reason is fairly simple. While capacitors have been used for a long time in electronics, capacitors and their souped-up cousins, supercapacitors, have only recently become candidates for competing with the common rechargeable battery. Supercapacitors store electricity as batteries do, but there are […]
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Working toward a ‘triple threat’ graphene transistor

Anyone paying attention to science or technology this year must have noticed that graphene is a big deal. As in two guys, Andre Geim and Konstantin Novoselov, both at the University of Manchester (UK), winning a Nobel Prize in physics for (more or less) launching graphene on its way to fame and fortune. Hardly a […]
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Fluorographene: The Teflon alternative and more

So you won a Nobel Prize for graphene; what do you do for an encore? Make something really useful out of it. Andre Geim at the University of Manchester, along with his colleague Kostya Novoselov put graphene on the (scientific) map around 2004. Their 2010 Nobel Prize put graphene into the public eye and made […]
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