Thermal effect on DWCNTs as rotational bearings

doi:10.1088/0957-4484/19/49/495708

	Thermal effect on DWCNTs as rotational bearings
	Zhu, B. E.; Pan, Z. Y.; Wang, Y. X.; Xiao, Y.
刊名	NANOTECHNOLOGY
	2008-12-10
卷号	19 页码:5
ISSN号	0957-4484
DOI	10.1088/0957-4484/19/49/495708
英文摘要	We have investigated the rotational motion and dynamic friction in a molecular bearing composed of double-walled carbon nanotubes (DWCNTs) using molecular dynamics simulations. The main study was on thermal effects due to the rotational friction. The diameters of the bearings varied between 6 and 16 angstrom for the inner shafts, and between 12 and 20 angstrom for the outer sleeves. The rotation velocity varied from 0.05 rotations ps(-1) to 0.25 rotations ps-1. The simulations show that the energy dissipation, and hence the temperature of the system, increases linearly with rotation time. The value of energy dissipation is around 0.59 meV/atom per rotation at omega = 0.05 rotations ps(-1) for a (15, 0)@(23, 0) bearing. Correspondingly, the average friction force is around 1.75 x 10(-5) nN/atom. The dependence of the energy dissipation on the rotation velocity, the interwall distance, and the contact area of the DWCNT is also discussed. It was observed that the energy dissipation becomes lowest when the interwall distance of the DWCNT bearing reaches about 0.34 nm, the equilibrium distance of the Lennard-Jones (L-J) potential. This low energy dissipation suggests that the DWCNT can be a good candidate for a wearless rotational bearing, which supports the previous studies.
资助项目	National Natural Science Foundation of China,[10376008]
WOS关键词	CARBON NANOTUBES
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000261043300029
资助机构	National Natural Science Foundation of China,
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/28623]
专题	中国科学院近代物理研究所
通讯作者	Pan, Z. Y.
作者单位	Fudan Univ, Inst Modern Phys, Appl Ion Beam Phys Lab, Shanghai 200433, Peoples R China
推荐引用方式 GB/T 7714	Zhu, B. E.,Pan, Z. Y.,Wang, Y. X.,et al. Thermal effect on DWCNTs as rotational bearings[J]. NANOTECHNOLOGY,2008,19:5.
APA	Zhu, B. E.,Pan, Z. Y.,Wang, Y. X.,&Xiao, Y..(2008).Thermal effect on DWCNTs as rotational bearings.NANOTECHNOLOGY,19,5.
MLA	Zhu, B. E.,et al."Thermal effect on DWCNTs as rotational bearings".NANOTECHNOLOGY 19(2008):5.