Raman Optothermal Technique for Measuring Thermal Conductivity of Graphene and Related Materials

TL;DR

This paper reviews a Raman spectroscopy-based optothermal method for measuring thermal conductivity in graphene and related 2D materials, highlighting its role in discovering graphene's unique heat conduction properties.

Contribution

It introduces and discusses a non-contact Raman optothermal technique for thermal conductivity measurement, extending its application from graphene to other thin film materials.

Findings

Raman optothermal method effectively measures thermal conductivity of graphene.

The technique revealed graphene's exceptional heat conduction properties.

Extension of the method to other 2D materials is feasible.

Abstract

We describe Raman spectroscopy based method of measuring thermal conductivity of thin films, and review significant results achieved with this technique pertinent to graphene and other two-dimensional materials. The optothermal Raman method was instrumental for the discovery of unique heat conduction properties of graphene. In this method, Raman spectroscopy is used to determine the local temperature of the sample while the excitation laser is utilized as a heat source. The success of Raman spectroscopy in investigating thermal conductivity of suspended graphene and graphene-based thin films motivated extension of this technique to other materials systems and films.