Raman spectroscopy of graphene at high pressure: Effects of the substrate and the pressure transmitting media

0394501 - ÚFCH JH 2014 RIV US eng J - Journal Article
Filintoglou, K. - Papadopoulos, N. - Arvanitidis, J. - Christofilos, D. - Frank, Otakar - Kalbáč, Martin - Parthenios, J. - Kalosakas, G. - Galiotis, C. - Papagelis, K.
Raman spectroscopy of graphene at high pressure: Effects of the substrate and the pressure transmitting media.
Physical Review. B. Roč. 88, č. 4 (2013), 045418. ISSN 1098-0121
R&D Projects: GA ČR GAP204/10/1677
Institutional support: RVO:61388955
Keywords : chemical vapor deposition * graphite * hydrostatic limits
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 3.664, year: 2013

The pressure evolution of the Raman spectrum of graphene grown by chemical vapor deposition on polycrystalline copper is investigated with the use of polar and nonpolar pressure transmitting media (PTM). The G and 2D Raman bands exhibit similar pressure slopes for both PTM irrespective of any unintentional initial doping and/or strain of the samples. Our analysis suggests that any pressure-induced charge transfer effects are too small to influence the pressure response of graphene; rather, it is determined by the compressibility of the substrate and the graphene interaction with the substrate and the PTM. For the nonpolar PTM, a peculiar pressure behavior of graphene is observed in thePTMsolidification regime, which resembles that of freestanding graphene.
Permanent Link: http://hdl.handle.net/11104/0222738