Facets of nanotube synthesis: High-resolution transmission electron microscopy study and density functional theory calculations

被引：25

作者：

Begtrup, Gavi E. ^{[1
,2
]}

Gannett, Will ^{[1
,2
]}

Meyer, Jannik C. ^{[1
,2
]}

Yuzvinsky, Thomas D. ^{[1
,2
,3
]}

Ertekin, Elif ^{[4
]}

Grossman, Jeffrey C. ^{[3
,4
]}

Zettl, Alex ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Ctr Integrated Nanomech Syst, Berkeley, CA 94720 USA

[4] Berkeley Nanosci & Nanoengn Inst, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 20期

关键词：

carbon nanotubes; catalysts; density functional theory; diffusion; iron; nanotechnology; transmission electron microscopy; AUGMENTED-WAVE METHOD; CARBON; GROWTH; SCALE; IRON;

D O I：

10.1103/PhysRevB.79.205409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the presence of catalytically active facets on iron nanocrystals during carbon nanotube synthesis. Using real-time in situ high-resolution transmission electron microscopy, we observe the facets' formation and interaction with carbon feedstock and are able to infer carbon diffusion across the catalyst surface facilitating nanotube formation. The observations are supported by density functional theory calculations.

引用

页数：6

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