Effect of purification on the electron structure and field emission characteristics of a carbonaceous material containing single-wall carbon nanotubes

被引：10
作者：
Okotrub, AV [1 ]
Bulusheva, LG [1 ]
Gusel'nikov, AV [1 ]
机构：
[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Div, Novosibirsk 630090, Russia
来源：
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2004年 / 99卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/1.1854812
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A carbonaceous material containing single-wall carbon nanotubes (SWNTs) has been synthesized by arc-discharge evaporation of graphite with a catalytic additive of nickel and cobalt powders. The synthesized SWNTs were purified from an amorphous carbon component (soot) and the catalyst particles by boiling in nitric acid. A comparison of the X-ray fluorescence spectra measured before and after this treatment showed that acid etching significantly decreased the content of soot in the material. The material enriched with SWNTs is characterized by a reduced threshold for the appearance of the field emission current, which is explained by a decrease in the screening effect of soot. The current-voltage characteristics of SWNTs exhibit a hysteresis, which is suggested to be due to the adsorption of molecules and radicals on the surface and at the ends of carbon nanotubes. (C) 2004 MAIK "Nauka/Interperiodica ".
引用
收藏
页码：1244 / 1252
页数：9
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