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

被引：18

作者：

Efthimiopoulos, Ilias ^{[1
,2
]}

Mayanna, Sathish ^{[2
]}

Stavrou, Elissaios ^{[3
]}

Torode, Antonius ^{[1
]}

Wang, Yuejian ^{[1
]}

机构：

[1] Oakland Univ, Dept Phys, Rochester, MI 48309 USA

[2] Deutsch GeoForsch Zentrum, D-14473 Potsdam, Germany

[3] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2020年 / 124卷 / 08期

基金：

美国国家科学基金会;

关键词：

PRESSURE-DEPENDENT RAMAN; X-RAY-DIFFRACTION; THERMAL-CONDUCTIVITY; TEMPERATURE-DEPENDENCE; PHASE-TRANSFORMATION; SINGLE-LAYER; GRAPHITE; SPECTROSCOPY; SCATTERING; SPECTRA;

D O I：

10.1021/acs.jpcc.9b10875

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：4835 / 4842

页数：8

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