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A simple model for size-dependent melting temperature and melting entropy of nanocrystals embedded in a matrix is introduced to interpret the superheating phenomenon. The model predicts not only melting temperature and the melting entropy increase for embedded nanocrystals as the size of the nanocrystals decreases, but also melting temperature and the melting entropy depression for free-standing nanocrystals...
Several models, free of any adjustable parameters, for the size-dependent melting temperature and the size-dependent lattice contraction of nanocrystals and related solid-liquid interface energy are introduced and compared with the newest experimental results of Bi nanocrystals. It is found that the models may interpret the experimental results well.
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