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已有 5326 次阅读 2009-4-22 10:26 |系统分类:科研笔记|关键词:学者


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


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


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

下一篇:17th Annual International Conference on Composites or Nano Engineering


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