Abstract
Controllable biaxial strain is delivered to monolayer graphene prepared by chemical vapor deposition via applying an electric field to the underlying piezoelectric [Pb(Mg1/3Nb2/3)O3]0.7-[PbTiO3]0.3substrate. The effects of tunable strain on the Raman spectra of graphene are investigated in reversible and real-time manners. Such strain can result in a blue shift in 2D band of graphene. The calculations based on the Grüneisen parameter identify the actual biaxial strain to graphene, leading to a continuous 2D band shift, which is detected during the retention of bias voltage. The physical mechanism behind this unique Raman behavior is discussed.
Original language | English |
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Article number | 223112 |
Journal | Applied Physics Letters |
Volume | 102 |
Issue number | 22 |
DOIs | |
Publication status | Published - 3 Jun 2013 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)