The pressure-induced phase transition studies of In2S3 and In2S3:Ce nanoparticles
Journal of Solid State Chemistry(2014)
摘要
A novel method, gas–liquid phase chemical deposition is developed to prepare In2S3 and In2S3:Ce nanoparticles. The structural, morphology and composition feature of these two nanoparticles is studied by XRD, HRTEM, and XPS. In situ high-pressure synchrotron X-ray diffraction studies were carried out by using a diamond-anvil cell. The doping does not influence the tetragonal-to-cubic phase transition path while results in a lower phase transition pressure of In2S3:Ce nanoparticles (4.3GPa) than that of In2S3 nanoparticles (7.1GPa). The bulk moduli of tetragonal phases are B0=87.1±4.3GPa and B0=55.6±4.1GPa, respectively. The distinct high-pressure behaviors can be explained in term of the doped ions, causing lattice distortion and reducing structural stability of the In2S3 nanoparticles and further accelerating the phase transition.
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关键词
High-pressure phase transition,Doped ions,Defect structure,Lattice distortion,Structural stability
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