Extracting subnanometer single shells from ultralong multiwalled carbon nanotubes

被引：58
作者：
Hong, BH
Small, JP
Purewal, MS
Mullokandov, A
Sfeir, MY
Wang, F
Lee, JY
Heinz, TF
Brus, LE
Kim, P [1 ]
Kim, KS
机构：
[1] Columbia Univ, Nanoscale Sci & Engn Ctr, New York, NY 10027 USA
[2] Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Superfunct Mat, Dept Chem, Div Mol & Life Sci, Pohang 790784, South Korea
来源：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2005年 / 102卷 / 40期
关键词：
atomic-force microscope; double-walled carbon nanotube; extraction; single-walled carbon nanotube; resonance Raman spectroscopy;
D O I：
10.1073/pnas.0505219102
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We report a simple but powerful method for engineering multi-walled carbon nanotubes (MWNTs) by using manipulation by an atomic-force microscope. The successive shell-by-shell extraction process of ultralong MWNTs allows the exposure of the innermost single-walled carbon nanotubes (SWNTs), which have diameters as small as approximate to 0.4 nm. The inner-shell extraction process changes the electrical characteristics of the MWNTs. Whereas the outer hollowed-out nanotubes show either metallic or semiconducting character, the innermost SWNTs of small diameter exhibit predominantly metallic transport properties.
引用
收藏
页码：14155 / 14158
页数：4
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