Vapor-phase synthesis, growth mechanism and thickness-independent elastic modulus of single-crystal tungsten nanobelts

Wang, Shiliang, Chen, Guoliang, Huang, Han, Ma, Shujun, Xu, Hongyi, He, Yuehui and Zou, Jin (2013) Vapor-phase synthesis, growth mechanism and thickness-independent elastic modulus of single-crystal tungsten nanobelts. Nanotechnology, 24 50: 505705.1-505705.9. doi:10.1088/0957-4484/24/50/505705

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Author Wang, Shiliang
Chen, Guoliang
Huang, Han
Ma, Shujun
Xu, Hongyi
He, Yuehui
Zou, Jin
Title Vapor-phase synthesis, growth mechanism and thickness-independent elastic modulus of single-crystal tungsten nanobelts
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
1361-6528
Publication date 2013-12-20
Sub-type Article (original research)
DOI 10.1088/0957-4484/24/50/505705
Open Access Status File (Author Post-print)
Volume 24
Issue 50
Start page 505705.1
End page 505705.9
Total pages 9
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Subject 1600 Chemistry
2208 Electrical and Electronic Engineering
2210 Mechanical Engineering
2211 Mechanics of Materials
2500 Materials Science
Abstract Single-crystal tungsten nanobelts with thicknesses from tens to hundreds of nanometers, widths of several micrometers and lengths of tens of micrometers were synthesized using chemical vapor deposition. Surface energy minimization was believed to have played a crucial role in the growth of the synthesized nanobelts enclosed by the low-energy {110} crystal planes of body-centered-cubic structure. The anisotropic growth of the crystallographically equivalent {110} crystal planes could be attributable to the asymmetric concentration distribution of the tungsten atom vapor around the nanobelts during the growth process. The elastic moduli of the synthesized tungsten nanobelts with thicknesses ranging from 65 to 306 nm were accurately measured using a newly developed thermal vibration method. The measured modulus values of the tungsten nanobelts were thickness-dependent. After eliminating the effect of surface oxidization using a core-shell model, the elastic modulus of tungsten nanobelts became constant, which is close to that of the bulk tungsten value of 410 GPa.
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Institutional Status UQ

 
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