Abstract
As the particle size in nanocomposites approaches the order of several nanometers that is comparable with the phonon wavelength, the phonon wave interference and particle scattering effect will lead to a much more complicated energy transport. This letter reports the investigation of phonon interference and scattering in Si/Ge nanocomposites by the phonon wave packet simulation. The particle size, particle layer number, and particle shape effects on the phonon transmission are considered. For both cubic and spherical particles, the phonon transmission coefficient fluctuates obviously with the increasing particle size and there are local peaks and valleys of transmission coefficient at certain particle sizes. The transmission decreases with the increasing layers of particle. The optical multi-layer transmission model can be applied to predict the transmission coefficient of Si/Ge nanocomposites with layered particles. The enhancement of thermal conductance is up to 19.1% due to the phonon interference effect.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
