Laser flash Raman spectroscopy method for thermophysical characterization of 2D nanomaterials

Qinyi Li, Xing Zhang, Yu Dong Hu

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Recently, a noncontact technique based on the temperature dependent Raman band shift has been applied for thermophysical characterization of low dimensional nanomaterials. However, the difficulty of accurately determining the laser absorption significantly limits the accuracy of this Raman technique. This paper presents a transient "laser flash Raman spectroscopy" method to characterize the thermal diffusivity, thermal conductivity and thermal contact resistance of 2D nanomaterials and the laser absorption can be easily eliminated by a normalization technique. The thermophysical properties can be determined by fitting the curves of the normalized temperature rise versus the laser heating time for various laser spot radii. Moreover, if the thermal contact resistance is neglected, the data analysis process is much more convenient and the relative error caused by neglecting the thermal contact resistance is only 1%.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalThermochimica Acta
Volume592
DOIs
Publication statusPublished - Sep 20 2014

Fingerprint

Nanostructured materials
flash
Raman spectroscopy
Contact resistance
contact resistance
Lasers
lasers
Laser heating
laser heating
Thermal diffusivity
thermophysical properties
thermal diffusivity
Thermal conductivity
thermal conductivity
Thermodynamic properties
Temperature
radii
temperature
shift
curves

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Laser flash Raman spectroscopy method for thermophysical characterization of 2D nanomaterials. / Li, Qinyi; Zhang, Xing; Hu, Yu Dong.

In: Thermochimica Acta, Vol. 592, 20.09.2014, p. 67-72.

Research output: Contribution to journalArticle

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