Determination of the melting temperature of palladium nanoparticles by X-ray absorption spectroscopy
Physics of the Solid State(2016)
摘要
The anharmonicity parameters of the interatomic potential in ~4-nm palladium nanoparticles deposited on poly(tetra)fluoroethylene microgranules 0.2–0.5 μm in average size were studied by X-ray absorption spectroscopy from an analysis of temperature-dependent EXAFS Pd K edges. The parameters of the interatomic potential obtained were used to calculate melting temperature T melt = 1591 K and Debye temperature Θ D = 257 K of palladium nanoparticles; these temperatures are significantly lower than those in metallic palladium: 277 K and 1825 K, respectively.
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关键词
Palladium,Debye Temperature,Interatomic Potential,Coordination Shell,Palladium Nanoparticles
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