Laser flash Raman spectroscopy method for characterizing thermal diffusivity of supported 2D nanomaterials

Qin Yi Li, Wei Gang Ma, Xing Zhang

研究成果: Contribution to journalArticle査読

32 被引用数 (Scopus)

抄録

2D nanomaterials have been attracting extensive research interests due to their superior properties and the accurate thermophysical characterization of 2D materials is very important for nanoscience and nanotechnology. This paper presents a transient "laser flash Raman spectroscopy" method for measuring the thermal diffusivity of 2D nanomaterials in the supported form without knowing the laser absorption coefficient. Square pulsed laser rather than continuous laser is used to heat the sample and the accumulated Raman signals are used to determine the time-averaged temperature rise of both the supported 2D material and the substrate. The laser absorption coefficient can be eliminated by comparing the temperature rises measured with different laser spot sizes and laser pulse durations. The method sensitivity is also analyzed by case studies for typical 2D nanomaterials. This method is useful for measuring the thermophysical properties of 2D materials in the most applicable forms and figuring out the difference between the supported and free-standing 2D material.

本文言語英語
ページ(範囲)956-963
ページ数8
ジャーナルInternational Journal of Heat and Mass Transfer
95
DOI
出版ステータス出版済み - 4 2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 機械工学
  • 流体および伝熱

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