Influence of strain distribution on the morphology evolution of a Ge/GeO2 core/shell nanoparticle confined in ultrathin Al2O3 thinfilm by surface oxidation
Zhang Ying (章英)a, Huang Hong-Hua (黄红华)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
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
Abstract The influence of strain distribution on morphology evolution of Ge/GeO2 core/shell nanoparticle confined in ultrathin Al2O3 thin film by surface oxidation is investigated. A finite-element simulation is performed to simulate the morphology evolution of the confined Ge/GeO2 core/shell nanoparticle under the influence of the local strain distribution. It indicates that the resultant oxidation-related morphology of Ge/GeO2 core/shell nanoparticle confined in ultrathin film is strongly dependent on the local strain distribution. On the other hand, the strain gradients applied on the confined GeO2 shell can be modified by the formation of polycrystalline GeO2 shell, which has potential application in tailoring the microstructure and morphology evolution of the Ge/GeO2 core/shell nanoparticle.
Zhang Ying (章英), Huang Hong-Hua (黄红华), Liu Xiao-Shan (刘晓山), Luo Xing-Fang (骆兴芳), Yuan Cai-Lei (袁彩雷), Ye Shuang-Li (叶双莉) Influence of strain distribution on the morphology evolution of a Ge/GeO2 core/shell nanoparticle confined in ultrathin Al2O3 thinfilm by surface oxidation 2015 Chin. Phys. B 24 037701
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