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由纳米管合成石墨烯纳米带

已有 5306 次阅读 2009-4-22 10:26 |系统分类:科研笔记|关键词:学者

4月16日Nature杂志上同时刊登了两篇由碳纳米管来合成石墨烯纳米带的文献,感兴趣的朋友可以看一看,很有些启发意义。

Longitudinal unzipping of carbon nanotubes to form graphene nanoribbons 872872

Graphene nanoribbons have important electronic properties — as their width increases they change from semiconductor to semi-metal — but it has been difficult to make large quantities. To do so, Tour et al. simply longitudinally unzip multiwalled carbon nanotubes with permanganate in acid to form graphene oxide, which is then reduced to restore electronic conductivity. The ribbons are about 100 nm wide (thinner ones tend to 'mat'), and the authors use them to make field-effect transistors.

Dmitry V. Kosynkin, Amanda L. Higginbotham, Alexander Sinitskii, Jay R. Lomeda, Ayrat Dimiev, B. Katherine Price & James M. Tour

:10.1038/nature07872:10.1038/nature07872

See also: Editor's summary | News and Views by Terrones


Narrow graphene nanoribbons from carbon nanotubes 877877

Unlike graphene itself, or carbon nanotubes, very narrow nanoribbons of graphene are completely semiconducting. Dai and colleagues reliably produce bulk quantities of sub-10 nm graphene nanoribbons by partial encapsulation of carbon nanotubes in a polymer. The exposed part of the nanotube can be cut by plasma etching, so that the nanotube unzips when the polymer is removed, leaving a very thin strip of graphene.

Liying Jiao, Li Zhang, Xinran Wang, Georgi Diankov & Hongjie Dai

:10.1038/nature07919:10.1038/nature07919

See also: Editor's summary | News and Views by Terrones



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