Watching carbon nanotubes grow

被引：30

作者：

Bonard, JM ^{[1
]}

Croci, M ^{[1
]}

Conus, F ^{[1
]}

Stöckli, T ^{[1
]}

Chatelain, A ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Fac Sci Base, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 15期

关键词：

D O I：

10.1063/1.1511539

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The growth of carbon nanotubes by chemical vapor deposition (CVD) is followed and characterized by performing field-emission microscopy directly in a modified CVD reactor, where the hydrocarbon gas is introduced at a partial pressure below 10(-2) mbar and a high voltage is applied between the heated substrate and a phosphor screen. This allows us not only to detect a field-emission current that increases with the length of the nanotubes, but also to observe the growth of the individual emitters by following the evolution of their field-emission patterns on the phosphor screen. Nanotubes grow after an activation time of a few s and reach a length of 5-10 mum in typically 10 s. We deduce a growth rate in the range 1-10 mum/s that increases with the gas pressure. (C) 2002 American Institute of Physics.

引用

页码：2836 / 2838

页数：3

共 18 条

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