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

Ilias Efthimiopoulos; Sathish Mayanna; Elissaios Stavrou; Antonius Torode; Yuejian Wang

doi:10.1021/acs.jpcc.9b10875

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 journal › Article › peer-review

16 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 language	English
Pages (from-to)	4835-4842
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	124
Issue number	8
DOIs	https://doi.org/10.1021/acs.jpcc.9b10875
State	Published - 27 Feb 2020
Externally published	Yes

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title = "Extracting the Anharmonic Properties of the G-Band in Graphene Nanoplatelets",

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.",

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AU - Mayanna, Sathish

AU - Stavrou, Elissaios

AU - Torode, Antonius

AU - Wang, Yuejian

PY - 2020/2/27

Y1 - 2020/2/27

N2 - 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.

AB - 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.

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EP - 4842

JO - Journal of Physical Chemistry C

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

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