Nano-sized double helices and braids: interesting carbon nanostructures

被引:21
作者
Liu, J [1 ]
Zhang, X [1 ]
Zhang, YJ [1 ]
Chen, XH [1 ]
Zhu, J [1 ]
机构
[1] Tsinghua Univ, Sch Mat Sci & Engn, Electron Microscopy Lab, Beijing 100084, Peoples R China
关键词
nanostructures; vapor deposition; electron microscopy;
D O I
10.1016/S0025-5408(02)01035-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Two interesting carbon nanostructures, the double helices and the nanobraids, have been synthesized by pyrolysis of acetone at 715 degreesC, using iron nanoparticles as catalysts. The double helix was formed by two nanofibers, strictly coiled together with a strikingly constant pitch. Such a rope-like structure usually extended hundreds of microns in length, and provided excellent strength, stability and flexibility. The nanobraids appeared to be partially rolled up from carbon layers. Electron microscopy was applied to characterize these carbon forms. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:261 / 267
页数:7
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