摘要
The stability of coiled carbon nanotubes under C ion irradiation is investigated by molecular dynamics simulations.The defect statistics shows that small curvature coiled carbon nanotubes have better radiation tolerance than normal straight carbon nanotubes.To understand the effect of the curvature on defect production,the threshold displacement energies for the upper and lower walls,as well as those for the side parts,are calculated.The results show that the lower wall has better radiation tolerance than the upper wall.For the upper wall,a small increase in the curvature of nanotube axis gives rise to an increase in the radiation tolerance and then a decrease with the curvature becomes larger.However,for the lower wall,as the curvature of the nanotube axis increases,the radiation tolerance increases as the bonds compressed slightly in our simulation.
作者
ZHOU Bin
ZHANG Wei
GONG Wen-Bin
WANG Song
REN Cui-Lan
WANG Cheng-Bin
ZHU Zhi-Yuan
HUAI Ping
周彬;张伟;巩文斌;王松;任翠兰;王呈斌;朱志远;怀平(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800;University of Chinese Academy of Sciences,Beijing 100049;Key Laboratory of Interfacial Physics and Technology,Chinese Academy of Sciences,Shanghai 201800;Key Laboratory of Nuclear Radiation and Nuclear Energy Technology,Chinese Academy of Sciences,Shanghai 201800)
基金
Supported by the National Basic Research Program of China under Grant No 2010CB934504
Strategically Leading Program of the Chinese Academy of Sciences under Grant No XDA02040100
the National Natural Science Foundation of China(11075196,11005142)
the Shanghai Municipal Science and Technology Commission(11ZR1445200)
CAS Hundred Talents Program.