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Influence of strain distribution on the morphology evolution of a Ge/GeO2 core/shell nanoparticle confined in ultrathin Al2O3 thin film by surface oxidation

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【作者】 章英； 黄红华； 刘晓山； 骆兴芳； 袁彩雷； 叶双莉；

【Author】 Zhang Ying;Huang Hong-Hua;Liu Xiao-Shan;Luo Xing-Fang;Yuan Cai-Lei;Ye Shuang-Li;Laboratory of Nanomaterials and Sensors,School of Physics,Electronics and Communication,Jiangxi Normal University;Institute of Microelectronics and Information Technology,Wuhan University;

【机构】 Laboratory of Nanomaterials and Sensors,School of Physics,Electronics and Communication,Jiangxi Normal University； Institute of Microelectronics and Information Technology,Wuhan University；

【摘要】 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.

【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.

【关键词】 strain； deformation； nanoparticles；
【Key words】 strain； deformation； nanoparticles；
【基金】 supported by the National Natural Science Foundation of China(Grant Nos.11164008,51461019,51361013,11174226,and 51371129)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2015年03期
  • 【分类号】O484.4
  • 【被引频次】1
  • 【下载频次】29
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