Laser flash raman spectroscopy method for characterizing thermal diffusivity of suspended and supported 2D nanomaterials

Qin Yi Li, Xing Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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. Recently, a noncontact technique based on the temperature dependent Raman band shifts has been used to measure the thermal conductivity of 2D materials. However, the heat flux, i.e. the absorbed laser power, was either theoretically estimated or measured by a laser power meter with uncertainty, resulting in large errors in thermal conductivity determination. This paper presents a transient "laser flash Raman spectroscopy" method for measuring the thermal diffusivity of 2D nanomaterials in both the suspended and supported forms without knowing laser absorption. Square pulsed laser instead of continuous laser is used to heat the sample and the laser absorption can be eliminated by comparing the measured temperature rises for different laser heating time and laser spot radii. This method is sensitive for characterizing typical 2D materials and useful for nanoscale heat transfer research.

Original languageEnglish
Title of host publicationMicro/Nano-Thermal Manufacturing and Materials Processing; Boiling, Quenching and Condensation Heat Transfer on Engineered Surfaces; Computational Methods in Micro/Nanoscale Transport; Heat and Mass Transfer in Small Scale; Micro/Miniature Multi-Phase Devices; Biomedical Applications of Micro/Nanoscale Transport; Measurement Techniques and Thermophysical Properties in Micro/Nanoscale; Posters
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791849668
DOIs
Publication statusPublished - Jan 1 2016
Externally publishedYes
EventASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016 - Biopolis, Singapore
Duration: Jan 4 2016Jan 6 2016

Publication series

NameASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016
Volume2

Other

OtherASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016
CountrySingapore
CityBiopolis
Period1/4/161/6/16

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All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

Cite this

Li, Q. Y., & Zhang, X. (2016). Laser flash raman spectroscopy method for characterizing thermal diffusivity of suspended and supported 2D nanomaterials. In Micro/Nano-Thermal Manufacturing and Materials Processing; Boiling, Quenching and Condensation Heat Transfer on Engineered Surfaces; Computational Methods in Micro/Nanoscale Transport; Heat and Mass Transfer in Small Scale; Micro/Miniature Multi-Phase Devices; Biomedical Applications of Micro/Nanoscale Transport; Measurement Techniques and Thermophysical Properties in Micro/Nanoscale; Posters (ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2016; Vol. 2). American Society of Mechanical Engineers. https://doi.org/10.1115/MNHMT2016-6648