Laser flash-Raman spectroscopy method for the measurement of the thermal properties of micro/nano wires

Jinhui Liu, Haidong Wang, Yudong Hu, Weigang Ma, Xing Zhang

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

This paper introduces a new method for measuring the thermal diffusivity and thermal conductivity of individual micro/nano wires using Raman spectroscopy. This method uses a focused short pulsed laser and a continuous-wave laser in a Raman spectroscopy system as the local heater, Raman signal excitation source, and temperature sensor. Unsteady and steady thermal conduction models are used to get two independent equations for the thermal diffusivity (α) and laser absorptivity (η). This new method is verified by comparing experimental results for graphite carbon fiber with measurement using the 3ω method. The method was then used to measure the temperature dependent thermal diffusivity and thermal conductivity of individual carbon nanotubes.

Original languageEnglish
Article number014901
JournalReview of Scientific Instruments
Volume86
Issue number1
DOIs
Publication statusPublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Instrumentation

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