Strain distributions of confined Au/Ag and Ag/Au nanoparticles

doi:10.1088/1674-1056/24/4/047803

Abstract The strain distributions of Au/Ag and Ag/Au nanoparticles confined in the Al₂O₃ matrix with different core sizes are investigated by using the finite element method, respectively. The simulation results clearly indicate that the compressive strains exerted on the Au/Ag and Ag/Au nanoparticles can be induced by the Al₂O₃ matrix. Moreover, it can be found that the strain gradient existing in a Au/Ag nanoparticle is much larger than that in a Ag/Au nanoparticle, which could be due to the larger Young's modulus of Au than that of Ag. With the core size increasing, the strain gradient existing in the Au/Ag nanoparticle becomes larger, while the strain gradient existing in the Ag/Au nanoparticle keeps constant. These different strain distributions may have significant influences on the structures and morphologies of the Au/Ag and Ag/Au nanoparticles, leading to the different physical properties for potential applications.

Keywords: nanoparticles strain finite element method

Received: 12 August 2014
Revised: 31 October 2014
Accepted manuscript online:

PACS:	78.67.Bf	(Nanocrystals, nanoparticles, and nanoclusters)
	68.35.Gy	(Mechanical properties; surface strains)
	47.11.Fg	(Finite element methods)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11164008, 51461019, 51361013, 11174226, and 51371129).

Corresponding Authors: Yuan Cai-Lei
E-mail: clyuan@jxnu.edu.cn

Cite this article:

Huang Hong-Hua (黄红华), Zhang Ying (章英), Liu Xiao-Shan (刘晓山), Luo Xing-Fang (骆兴芳), Yuan Cai-Lei (袁彩雷), Ye Shuang-Li (叶双莉) Strain distributions of confined Au/Ag and Ag/Au nanoparticles 2015 Chin. Phys. B 24 047803

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