Nucleation of Graphene and Its Conversion to Single-Walled Carbon Nanotubes

被引：59

作者：

Picher, Matthieu ^{[1
,2
]}

Lin, Pin Ann ^{[1
,2
]}

Gomez-Ballesteros, Jose L. ^{[3
]}

Balbuena, Perla B. ^{[3
]}

Sharma, Renu ^{[1
]}

机构：

[1] NIST, Ctr Nanoscale Sci & Technol, Gaithersburg, MD 20899 USA

[2] Univ Maryland IREAP, College Pk, MD 20742 USA

[3] Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA

来源：

NANO LETTERS | 2014年 / 14卷 / 11期

关键词：

Carbon nanotubes; graphene nucleation mechanism; environmental transmission; electron microscopy; CHIRALITY; GROWTH;

D O I：

10.1021/nl501977b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We use an environmental transmission electron microscope to record atomic-scale movies showing how carbon atoms assemble together on a catalyst nanoparticle to form a graphene sheet that progressively lifts-off to convert into a nanotube. Time-resolved observations combined with theoretical calculations confirm that some nanoparticle facets act like a vice-grip for graphene, offering anchoring sites, while other facets allow the graphene to lift-off, which is the essential step to convert into a nanotube.

引用

页码：6104 / 6108

页数：5

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