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

Journal Article · · Journal of Physical Chemistry. C

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.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1602661
Report Number(s):
LLNL-JRNL-798948; 998963; TRN: US2104039
Journal Information:
Journal of Physical Chemistry. C, Vol. 124, Issue 8; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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