作者：Liu, D.-P.;Yu, N.-S.;Li, D.-W.;Pan, L.-J.;

作者单位：Institute of Optoelectronic, Technology Dalian Nationalities University, Dalian, 116600, China;Institute of Optoelectronic, Technology Dalian Nationalities University, Dalian, 116600, China;School of Physics and Optoelectronic Technology Dalian, Universit

刊名：Chemical vapor deposition

ISSN：0948-1907

出版年：2010-01-05

卷：16

期：41005

起页：166

止页：169

分类号：TQ175

语种：英文

关键词：Carbon nanocoils;Catalyst;Facet;Geometric structure;Growth mechanism;

内容简介

The relationship between the geometric structures of catalyst particles and the growth of carbon nanocoils (CNCs) is investigated. It is found that the CNCs usually consist of over two, but less than five tubules. The catalyst particles at the tips of CNCs are all polyhedron structures, in most cases, hexahedron. It is considered that a catalyst particle has two kinds of crystal facets, the catalytically active facet and the carbon precipitation facet. The active facet mainly plays the roles of decomposition of hydrocarbon and diffusion of the formed carbon atoms, while carbon tubules are grown from the precipitation facets and twisted to form a carbon coil. Catalysts with different numbers of active facets and geometric structures form different types of CNCs.