Acoustic Mismatch Model for Thermal Contact Conductance of Van Der Waals Contacts Under Static Force. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Prasher, Ravi
• Is Part Of: Nanoscale and microscale thermophysical engineering. Volume 22:Issue 1(2018)
• Page Start: 1
• Page End: 5
• Publication Date: 2018-01-02
• Subjects: Van der Waals interface -- phonon thermal contact resistance -- phonon thermal contact conductance -- hard and soft interface -- thermal transport at hydrogen bonds; Heat -- Transmission -- Periodicals; Heat -- Transmission; Electronic journals; Periodicals; 621.402
• DOI: 10.1080/15567265.2017.1391905
• Languages: English
• ISSNs: 1556-7265

Abstract

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).