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Doping of bi‐layer graphene by gradually polarizing a ferroelectric polymer
Author(s) -
Kalbac Martin,
Kong Jing,
Dresselhaus Mildred S.
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201300053
Subject(s) - graphene , raman spectroscopy , ferroelectricity , materials science , doping , polarization (electrochemistry) , polymer , layer (electronics) , nanotechnology , optoelectronics , optics , composite material , chemistry , physics , dielectric
The influence of the gradual polarization of a ferroelectric polymer on isotopically labeled bi‐layer graphene has been investigated by Raman spectroscopy. The Raman frequencies of the 13 C graphene modes are downshifted with respect to the Raman frequencies of 12 C graphene, which enabled us to study the individual layer components of bi‐layer graphene. The polarization of the ferroelectric polymer has a similar influence on the electron and hole concentration at the 13 C graphene and the 12 C graphene layer despite the 13 C graphene layer being only in direct contact with the ferroelectric polymer. In the Raman experiment the doping of graphene was confirmed by a similar frequency shift of the G modes and similar changes in the intensities of the G′ modes during the electrochemical charging of the ferroelectric polymer.