Departmental Papers (MEAM)

Document Type

Journal Article

Date of this Version

October 2004

Comments

Postprint version. Published in Microscale Thermophysical Engineering, Volume 8, Issue 4, October/November/December 2004, pages 341-359.
Publisher URL: http://dx.doi.org/10.1080/10893950490516893

Abstract

Molecular dynamics simulations of thermal conduction in nanoporous thin films are performed. Thermal conductivity displays an inverse temperature dependence for films with small pores and a much less pronounced dependence for larger pores. Increasing porosity reduces thermal conductivity, while pore shape has little effect except in the most anisotropic cases. The pores separate the film into local regions with distinctly different temperature profiles and thermal conductivities, and the effective film thermal conductivity is lowest when the pores are positioned in the center of the film. Such tunability by pore placement highlights new possibilities for engineering nanoscale thermal transport.

Keywords

Molecular Dynamics, Nanopore, Thin Film, Local Thermal Conductivity, Tunable Properties

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Date Posted: 21 January 2006

This document has been peer reviewed.