查看完整版本: 科学家预测：石墨烯基器件或者部件不久将会出现

科学家预测：石墨烯基器件或者部件不久将会出现

[b][size=3]Graphene-based gadgets may be just years away[/size][/b]
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【纳米科技世界快讯】Researchers at The University of Manchester have produced tiny liquid crystal devices with electrodes made from graphene – an exciting development that could lead to computer and TV displays based on this technology.[/color][/b]
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TQ5cssf;N Hexagonal arrangement of carbon atoms in an ideal graphene sheet. Credit: Thomas Szkopek, McGill University[/color]l9^G5@"z%K;J
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Writing in the American Chemical Society’s journal [i]Nano Letters[/i], Dr Kostya Novoselov and colleagues from The School of Physics and Astronomy and The School of Computer Science, report on the use of graphene as a transparent conductive coating for [color=Red]electro-optical devices [/color]– and show that its high transparency and low resistivity make it ideal for electrodes in liquid crystal devices.
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Graphene was discovered at The University of Manchester back in 2004, by Professor Andre Geim FRS and Royal Society Research Fellow Dr Kostya Novoselov. This incredible one-atom-thick gauze of carbon atoms, which resembles chicken wire, has quickly become one of the hottest topics in physics and materials science. ^Qy!B8a2p

#teg6}1P7NU\ “Graphene is only one atom thick, optically transparent, chemically inert, and an excellent conductor,” says Dr Novoselov, from the Manchester research team.6F%}jy'`;b1Z

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“These properties seem to make this material an excellent candidate for applications in various electro-optical devices that require conducting but transparent thin films. We believe graphene should improve the durability and simplify the technology of potential electronic devices that interact with light.”IVm(nz-e~'|_
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Prof Geim said: “Transparent conducting films are an essential part of many gadgets including common liquid crystal displays (LCDs) for computers, TVs and mobile phones.)gp r+ra
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“The underlying technology uses thin metal-oxide films based on indium. But indium is becoming an increasingly expensive commodity and, moreover, its supply is expected to be exhausted within just 10 years.
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1NF'h+FAa “Forget about oil – our civilisation will first run out of indium. Scientists have an urgent task on their hands to find new types of conductive transparent films.”
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The Manchester research team has now demonstrated highly transparent and highly conductive ultra-thin films that can be produced cheaply by ‘dissolving’ chunks of graphite – an abundant natural resource – into graphene and then spraying the suspension onto a glass surface.pm9v6m9q

MK b~ h$?Gr The resulting graphene-based films can be used in LCDs and, to prove the concept, the research team have demonstrated the first liquid crystal devices with graphene electrodes.KO5z:ps|4a2W2mU
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Dr Novoselov believes that there are only a few small, incremental steps remain for this technology to reach a mass production stage. “Graphene-based LCD products could appear in shops as soon as in a few years”, he adds.
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_'e A research team from the Max Planck Institute for Polymer Research in Germany recently reported in Nano Letters how they had used graphene-based films to create transparent electrodes for solar cells [Wang, X.; Zhi, L.; Mullen, K. Nano Lett. 2008, 8, 323.].
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But the German team used a different technology for obtaining graphene films, which involved several extra steps.
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^5d&u/`.E^A The Manchester team says the films they have developed are much simpler to produce, and they can be used not only in LCDs but also in solar cells.
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!J|;Sbp Source: University of Manchester