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

• 作者: 刘晓山 叶双莉 章英 袁彩雷 骆兴芳 黄红华
• 来源期刊: 中国物理B（英文版）
• 关键词: nanoparticles strain finite element method
• 年，卷（期）: 2015,（4）
• 页码范围: 047803-1-047803-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/4/047803

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 infl uences on the structures and morphologies of the Au/Ag and Ag/Au nanoparticles, leading to the different physical properties for potential applications.