Closed-Edged Graphene Nanoribbons from Large-Diameter Collapsed Nanotubes

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• 作者：Chenguang Zhang ; Ksenia Bets ; Seung Soo Lee ; Zhengzong Sun ; Francesca Mirri ; Vicki L. Colvin ; Boris I. Yakobson ; James M. Tour ; Robert H. Hauge
• 刊名：ACS Nano
• 出版年：2012
• 出版时间：July 24, 2012
• 年：2012
• 卷：6
• 期：7
• 页码：6023-6032
• 全文大小：731K
• 年卷期：v.6,no.7(July 24, 2012)
• ISSN：1936-086X

文摘

The diameter dependence of the collapse of single- and double-walled carbon nanotubes to two- and four-walled graphene nanoribbons with closed edges (CE_xGNRs) has been experimentally determined and compared to theory. TEM and AFM were used to characterize nanotubes grown from preformed 4.0 nm diameter aluminum鈥搃ron oxide particles. Experimental data indicate that the energy equivalence point (the diameter at which the energy of a round and fully collapsed nanotube is the same) is 2.6 and 4.0 nm for single- and double-walled carbon nanotubes, respectively. Molecular dynamics simulations predict similar energy equivalence diameters with the use of 蔚 = 54 meV/pair to calculate the carbon鈥揷arbon van der Waals interaction.

Keywords:

collapsed nanotube; graphene nanoribbon; single-walled carbon nanotubes; double-walled carbon nanotubes; aluminum鈭抜ron oxide nanoparticles; molecular dynamics simulation; carbon鈭抍arbon van der Waals interaction