Tunable interfacial thermal conductance by molecular dynamics
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Authors
Shen, Meng
Issue Date
2013-08
Type
Electronic thesis
Thesis
Thesis
Language
ENG
Keywords
Materials science and engineering
Alternative Title
Abstract
Finally, we also replaced graphene layers by a few WSe_2 sheets and observed that interfacial thermal resistance of a Si/n-WSe_2/Si structure increases linearly with interface thickness at least for 1 < n <= 20, indicating diffusive heat transfer mechanism, in contrast to ballistic behavior of a few graphene layers. The corresponding thermal conductivity (0.048 W m^-1 K^-1) of a few WSe_2 layers is rather small. By comparing phonon dispersion of graphene layers and WSe_2 sheets, we attribute the diffusive behavior of a few WSe_2 sheets to abundant optical phonons at low and medium frequencies leading to very short mean free path.
Description
August 2013
School of Engineering
School of Engineering
Full Citation
Publisher
Rensselaer Polytechnic Institute, Troy, NY