Extracting the Anharmonic Properties of the G-Band in Graphene Nanoplatelets
Journal Article
·
· Journal of Physical Chemistry. C
- Oakland Univ., Rochester, MI (United States); Deutsches GeoForschungsZentrum, Potsdam (Germany)
- Deutsches GeoForschungsZentrum, Potsdam (Germany)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Oakland Univ., Rochester, MI (United States)
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 Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1602661
- Alternate ID(s):
- OSTI ID: 1605440
- Report Number(s):
- LLNL-JRNL--798948; 998963
- Journal Information:
- Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 8 Vol. 124; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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