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

• Published in: Chinese physics B Vol. 24; no. 4; pp. 463 - 466
• Main Author: 黄红华 章英 刘晓山 骆兴芳 袁彩雷 叶双莉
• Format: Journal Article
• Language: English
• Published: 01.04.2015
• Subjects: Aluminum oxide; Constants; Gold; Nanoparticles; Physical properties; Silver; Strain; Strain distribution; 仿真结果; 压缩应变; 应变分布; 应变梯度; 有限元法; 金纳米粒子; 金纳米颗粒; 银纳米颗粒
• ISSN: 1674-1056; 2058-3834; 1741-4199
• DOI: 10.1088/1674-1056/24/4/047803

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 he 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 modu]us of An than that of Ag. With the core size increasing, the strain gradient existing in the Au/Ag nanoparficle 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.