›› 2015, Vol. 24 ›› Issue (4): 47803-047803.doi: 10.1088/1674-1056/24/4/047803

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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

黄红华a, 章英a, 刘晓山a, 骆兴芳a, 袁彩雷a, 叶双莉b   

  1. a Laboratory of Nanomaterials and Sensors, School of Physics, Electronics and Communication, Jiangxi Normal University, Nanchang 330022, China;
    b Institute of Microelectronics and Information Technology, Wuhan University, Wuhan 430072, China
  • 收稿日期:2014-08-12 修回日期:2014-10-31 出版日期:2015-04-05 发布日期:2015-04-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11164008, 51461019, 51361013, 11174226, and 51371129).

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

Huang Hong-Hua (黄红华)a, Zhang Ying (章英)a, Liu Xiao-Shan (刘晓山)a, Luo Xing-Fang (骆兴芳)a, Yuan Cai-Lei (袁彩雷)a, Ye Shuang-Li (叶双莉)b   

  1. a Laboratory of Nanomaterials and Sensors, School of Physics, Electronics and Communication, Jiangxi Normal University, Nanchang 330022, China;
    b Institute of Microelectronics and Information Technology, Wuhan University, Wuhan 430072, China
  • Received:2014-08-12 Revised:2014-10-31 Online:2015-04-05 Published:2015-04-05
  • Contact: Yuan Cai-Lei E-mail:clyuan@jxnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11164008, 51461019, 51361013, 11174226, and 51371129).

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摘要： 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.

关键词: nanoparticles, strain, finite element method

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.

Key words: nanoparticles, strain, finite element method

中图分类号:  (Nanocrystals, nanoparticles, and nanoclusters)

  • 78.67.Bf
68.35.Gy (Mechanical properties; surface strains) 47.11.Fg (Finite element methods)