Influence of strain distribution on the morphology evolution of a Ge/GeO

Author： Ying Zhang Hong-Hua Huang Xiao-Shan Liu Xing-Fang Luo Cai-Lei Yuan Shuang-Li Ye

E-ISSN： 1741-4199|24|3|37701-37704

ISSN： 1674-1056

Source： Chinese Physics B, Vol.24, Iss.3, 2015-03, pp. : 37701-37704

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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.