Acoustic Mismatch Model for Thermal Contact Conductance of Van Der Waals Contacts Under Static Force

Acoustic Mismatch Model for Thermal Contact Conductance of Van Der Waals Contacts Under Static Force

TitleAcoustic Mismatch Model for Thermal Contact Conductance of Van Der Waals Contacts Under Static Force
Publication TypeJournal Article
Year of Publication2018
AuthorsRavi S Prasher
JournalNanoscale and Microscale Thermophysical Engineering
Volume22
Issue1
Pagination1 - 5
Date Published02/2018
ISSN1556-7265
Keywordshard and soft interface, phonon thermal contact conductance, phonon thermal contact resistance, thermal transport at hydrogen bonds, Van der Waals interface
Abstract

Van der Waals interfaces play a major role in technology today. Thermal transport in material systems with van der Waals interfaces is mainly limited by the contact conductance. Although the effects of static force, such as pressure or the electrostatic part of hydrogen bonds, on the thermal contact conductance of van der Waals interfaces have been examined in a few studies, the focus was either on numerical simulation using techniques such as molecular dynamics or on experimental investigation. In this article, an analytical model of thermal contact conductance that accounts for the effects of static force and adhesion energy is presented. The application of static forces is found to cause a decrease in the intermolecular distance, which leads to increased interatomic forces across the interfaces and thus higher thermal conductance. The model is in good agreement with experimental data on the effect of pressure on thermal conductance collected by Gotsmann and Lantz (Nature Materials, Vol. 12, p. 59–65, 2012).

DOI10.1080/15567265.2017.1391905
Short TitleNanoscale and Microscale Thermophysical Engineering