Extracting the Anharmonic Properties of the G-Band in Graphene Nanoplatelets

Ilias Efthimiopoulos*, Sathish Mayanna, Elissaios Stavrou, Antonius Torode, Yuejian Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We have examined the effect of temperature and pressure on the Raman-active G-band of graphene nanoplatelets with an average thickness of 4 nm. Measuring the Raman mode frequency and width of the G-band as a function of temperature and pressure allowed us to extract the individual factors contributing to the frequency and width of the G-band, that is, the volumetric (thermal expansion) and anharmonic (phonon-phonon interactions) terms responsible for the Raman shift and the electron-phonon coupling and anharmonic contributions controlling the width/lifetime of the G-band. Considering the available literature, the significant role of the anharmonic effects in understanding the G-band physical processes in carbon-based systems is highlighted.

Original languageEnglish
Pages (from-to)4835-4842
Number of pages8
JournalJournal of Physical Chemistry C
Volume124
Issue number8
DOIs
StatePublished - 27 Feb 2020
Externally publishedYes

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