Catalyst rotation, twisting, and bending during multiwall carbon nanotube growth

被引：22

作者：

Behr, Michael J. ^{[1
]}

Mkhoyan, K. Andre ^{[1
]}

Aydil, Eray S. ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

CARBON | 2010年 / 48卷 / 13期

基金：

美国国家科学基金会;

关键词：

IRON CARBIDE; PARTICLES; NUCLEATION;

D O I：

10.1016/j.carbon.2010.06.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Internal crystalline structure of cementite catalyst particles located inside the base of multiwall carbon nanotubes was studied using nanoprobe convergent-beam electron diffraction. The catalyst particles are single crystalline but exhibit combinations of small-angle (similar to 1 degrees-3 degrees) rotations, twists, and bends along their axial length between adjacent locations. Distortions are most severe away from the base up into the nanotube where the number of walls is large. Near the attachment point to the substrate, however, where few, if any graphene walls exist, particles remain undistorted. This suggests that the stresses generated by the surrounding nanotube distort the catalyst particle during growth. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3840 / 3845

页数：6

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