Positron Annihilation In Carbon Nanotubes

被引：5
|
作者：
Guo Wei-feng [1 ]
Chen xiang-lei [1 ]
Du huai-jiang [1 ]
Weng hui-min [1 ]
Ye bang-jiao [1 ]
机构：
[1] Univ Sci & Technol China, Lab Nucl Solid State Phys, Hefei 230026, Peoples R China
来源：
POSITRON AND POSITRONIUM CHEMISTRY | 2009年 / 607卷
关键词：
positron annihilation; carbon nanotubes; C-60;
D O I：
10.4028/www.scientific.net/MSF.607.198
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Positron annihilation lifetime spectra have been measured in carbon nanotubes being pressed as a function of pressure up to 1536MPa. In addition, positron lifetime experiments for carbon nanotubes in vacuum, nitrogen and air have been performed respectively. Lifetimes have been obtained using LIFETIME program. The results display a single-component positron annihilation lifetime. Positron lifetime for carbon nanotubes decreases as the pressure increases, but lifetime is basically consistent after the pressure of 960MPa. Positron annihilation lifetime for carbon nanotubes in air is the shortest whereas the lifetime in vacuum the longest. We conclude that a positron annihilates with an electron on the external surface of carbon nanotubes.
引用
收藏
页码：198 / 200
页数：3
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