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| Influence of strain distribution on the morphology evolution of a Ge/GeO2 core/shell nanoparticle confined in ultrathin Al2O3 thinfilm by surface oxidation |
| Zhang Yinga, Huang Hong-Huaa, Liu Xiao-Shana, Luo Xing-Fanga, Yuan Cai-Leia, Ye Shuang-Lib |
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 |
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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.
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Received: 26 June 2014
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| PACS: |
77.80.bn
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(Strain and interface effects)
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91.55.Mb
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(High strain deformation zones)
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78.67.Bf
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(Nanocrystals, nanoparticles, and nanoclusters)
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| Fund:Project supported by the National Natural Science Foundation of China (Grant Nos. 11164008, 51461019, 51361013, 11174226, and 51371129). |
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Corresponding Authors: Yuan Cai-Lei
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E-mail: clyuan@jxnu.edu.cn
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2015, Vol. 24 
