Size-dependent melting temperature and thermal conductivity of nanoscale semiconductors

作者：Liang L H^*; Li Baowen

来源：International Journal of Modern Physics B, 2007, 21(23-24): 4026-4029.

DOI：10.1142/S0217979207045141

• nanosemiconductors
• thermal conductivity
• melting temperature
• size effect

A model describing size-dependent melting temperature and thermal conductivity of nanosemiconductors is proposed based on Lindermann';s melting criterion and Debye model. By the atomic thermal vibration consideration and by introducing intrinsic size effect of phonon velocity and mean free path combined with surface scattering effect, the model predicts that the melting temperature and thermal conductivity of nanosemiconductors decrease as the size reduces. The size effect depends on such material parameters as the vibration entropy, mean free path, the characteristic crystal size and surface roughness. The predictions are in agreement with experimental results of Si nanoparticles, nanowires and thin films.

• 出版日期2007-9-30