Nanosecond transient thermoreflectance method for characterizing anisotropic thermal conductivity

Chao Yuan*, William M. Waller, Martin Kuball

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)

Abstract

A method is presented to characterize the anisotropic thermal properties of materials based on nanosecond transient thermoreflectance (TTR). An analytical heat transfer model is derived for the TTR signal, showing that the signal is sensitive to out-of-plane and in-plane heat conductions at distinct time scales. This sensitivity feature can be exploited to simultaneously determine the out-of-plane and in-plane thermal conductivities. Examples are given for molybdenum disulphide, hexagonal boron nitride, and highly oriented pyrolytic graphite to assess the validity of this method.

Original languageEnglish
Article number114903 (2019)
Number of pages7
JournalReview of Scientific Instruments
Volume90
Issue number11
DOIs
Publication statusPublished - 15 Nov 2019

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