Temperature Effect on Tensile Behavior of Helical Multi-Shell Gold Nanowires

Abstract:

This study performs molecular dynamics (MD) simulations to investigate the tensile behavior of Helical Multi-Shell (HMS) gold nanowires. As their name suggests, these nanowires have a multi-shell helical structure rather than a conventional bulk FCC structure. The mechanical properties and deformation behaviors of the 7-1, 11-4 and 14-7-1 HMS structures are examined under tensile testing at temperatures between 4K and 300 K and a constant strain rate of 0.003% −1 ps . The results reveal that temperature influences the yielding stress, the Young’s modulus, and the deformation behaviors of HMS nanowires. The yielding stress of the 7-1 structure is found to be higher than that of the 11-4 or 14-7-1 structures. Finally, under different temperature conditions, many different close-packed structures are identified in the nanowires before they fracture.

• Periodical: Materials Science Forum (Volumes 505-507)
• Pages: 385-390
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.505-507.385
• Online since: January 2006
• Authors: Jenn Sen Lin, Shin Pon Ju, Yu-Lin Peng, Wen Jay Lee
• Keywords: Helical Multi-Shelled Structure, Molecular Dynamic (MD), Nanowire, Tensile Test, Tight-Binding Potential

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