Morphology-engineered strain transformation in Ge/GeO2 core/shell nanoparticles |
| |
| Institution: | 1. Laboratory of Nanomaterials and Sensors, School of Physics, Electronics and Communication, Jiangxi Normal University, Nanchang 330022, Jiangxi, China;2. Institute of Microelectronics and Information Technology, Wuhan University, Wuhan 430072, Hubei, China;1. Ibn Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, Skudai 81310, Johor, Malaysia;2. Advanced Optical Material Research Group, Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia;1. Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;2. Laboratory of Nanostructures Research (LRN), E.A. 4682, UFR Sciences, Department of Physics, University of Reims Champagne-Ardenne, 21 rue Clément Ader, cedex 02, Reims 51685, France;3. Electrical Engineering Department, Czestochowa University Technology, Armii Krajowej 17, Czestochowa, Poland;4. Department of Inorganic and Physical Chemistry, Eastern European National University, 13 Voli Avenue, Lutsk 43025, Ukraine;1. Department of Physics, Trakya University, Edirne 22030, Turkey;2. Department of Mathematics, Trakya University, Edirne 22030, Turkey;1. Departamento de Física, Pontifícia Universidade Católica de Goiás, 74605-010 Goiânia, Goiás, Brazil;2. Condensed Matter Physics Department, Institute of Physics “Gleb Wataghin”, State University of Campinas-Unicamp, 13083-859 Campinas, SP, Brazil |
| |
| Abstract: | Growth of nanoparticles embedded in a host matrix can lead to substantial strain. Ge/GeO2 core/shell nanoparticles embedded in amorphous Al2O3 matrix is fabricated by the pulsed laser deposition method and rapid thermal annealing technique, which is confirmed by the experimental HRTEM result and consistent with Zhdanov׳s theoretical prediction. A finite-element calculation is performed to investigate the tuning effect on the strain by the morphology evolution of the Ge/GeO2 core/shell nanoparticle embedded in Al2O3 matrix. The simulated result indicates that the strain at the interface between the core and the shell strongly depends on the morphology of the nanoparticles. Moreover, it can be found that there is a dramatic transformation of the strain on Ge core from tensile to compressive strain during the shrinkage of Ge core and the expansion of GeO2 shell. The simulated results indicate that the strain can be designed by tuning the morphology of the nanoparticles, which provides an opportunity to engineer the properties of the nano-sized core/shell structures. |
| |
| Keywords: | Nanoparticles Strain Finite element method |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
