Paper Title:
Au Nanowires Encapsulated in Carbon Nanotubes: Structure, Melting and Mechanical Properties
  Abstract

Classical molecular dynamics simulation was used to investigate the structure, melting and mechanical properties of Au nanowires encapsulated in single-walled carbon nanotubes (SWCNT). A possibility of synthesizing controlled Au nanowires was firstly studied by encapsulating small clusters into CNTs with suitable diameters. The nanowires with multi-shell structure of cylindrical symmetry are predicted as a consequence of spontaneous and confined coalescence of gold clusters. The investigation of melting temperature and behavior of a gold nanowire with multi-shells in a carbon nanotube (CNT) showed that the melting temperature of the enclosed Au nanowire is lower than its bulk counterpart and higher than that observed for free-standing ones. Different from the melting behavior of freestanding Au nanowires, the melting of Au nanowires enclosed in CNTs with tube diameters (D) in the range of 1.08 nm < D < 2.09 nm investigated here was found to initiate from the center layers. Finally, the deformation behavior of the gold-filled single-walled carbon nanotube was simulated under axial compression. The results show that the buckling strength of the Au-filled carbon nanotube is increased compared with that of a hollow tube, and is similar to the case of filling with gases or fullerenes. The interactions between filling elements and the carbon wall help restrain the collapse of the tube. With Au-filling, the filled tube experiences an elastic-inelastic transition, somewhat like the behavior of metals, which is different from the cases when it is filled with gases or fullerenes, particularly for low filling density.

  Info
Periodical
Edited by
Rongming Wang, Ying Wu and Xiaofeng Wu
Pages
277-285
DOI
10.4028/www.scientific.net/MSF.688.277
Citation
Y. X. Wang, Z. Y. Pan, B. E. Zhu, Y. Xiao, S. H. Guo, "Au Nanowires Encapsulated in Carbon Nanotubes: Structure, Melting and Mechanical Properties", Materials Science Forum, Vol. 688, pp. 277-285, 2011
Online since
June 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zong Wei Xu, Ying Chun Liang, Shen Dong, Li Qiang Gu, T. Sun, Qing Liang Zhao
Abstract:An improved arc welding method was developed to fabricate carbon nanotube probe under direct view of optical microscope. The new fabrication...
758
Authors: S.A. Moshkalev, J. Leon, Carla Veríssimo, A.R. Vaz, A. Flacker, M.B. de Moraes, J.W. Swart
Abstract:A method of ac dielectrophoresis was applied to align and deposit metallic multi-wall carbon nanotubes between pre-fabricated metal (Au, Pd)...
25
Authors: Fu Hua Zhang, Xiao Dong He, Li Hua Dong, Yan Sheng Yin
Abstract:Molecular simulations of the interfacial properties of (1) a composite with an epoxy(EP) matrix and a carbon nanotube(CNT)/carbon fiber(CF)...
1289
Authors: Kun Cai
Abstract:The deformation of single-walled carbon nanotubes (SWCNTs) under large axial strain is studied by a geometrical mapping method. The...
3910
Authors: Kulpreet Singh Virdi, K.C. Hari Kumar
Abstract:Using first-principle calculations employing density functional theory (DFT) the stabilityof a (3, 3) carbon nanotube (CNT) intercalated with...
27