Formation and structure of circular-disc assemblies of double-walled carbon nanotubes from a catalytic CVD reaction

被引：3

作者：

Zhong, Xiao-Hua ^{[1
,2
]}

Li, Ya-Li ^{[1
,2
]}

Hou, Feng ^{[1
,2
]}

Feng, Jian-Min ^{[1
,2
]}

机构：

[1] Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Sch Mat Sci & Engn, Minist Res, Tianjin 300072, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2008年 / 92卷 / 03期

关键词：

D O I：

10.1007/s00339-008-4629-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A large-size circular-disc (CD) assembly of carbon nanotubes (CNTs) was formed from injection catalytic chemical vapor deposition (CVD) reactions. The CNT-CD assembly, which has an outer diameter of 830 nm, consists of closely packed rings of double-walled carbon nanotubes (DWNTs), in twenty-eight circles, and stacked in five layers. A structural interpretation suggests that the CNT-CD assembly is coiled from a "tape-like" bundle of DWNTs, whose coiling to form the CNT-CD resembles the rolling up of tape to form a disc. The large CD assembly was formed within milliseconds in the transient gas flow reactions, and the coiling of nanotubes or "nucleation" of the circular assembly was associated with shears generated by gas disturbances in the vapor phase.

引用

页码：709 / 713

页数：5

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