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Probing built‐in strain in freestanding graphene monolayers by Raman spectroscopy
Author(s) -
Metten Dominik,
Federspiel François,
Romeo Michelangelo,
Berciaud Stéphane
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.201300220
Subject(s) - raman spectroscopy , graphene , materials science , strain (injury) , monolayer , ultimate tensile strength , tensile strain , sample (material) , nanotechnology , composite material , optics , chemistry , physics , chromatography , medicine
We report a detailed spatially resolved Raman study on a set of eight pristine freestanding graphene monolayers. While we find, as previously reported, that freestanding graphene is quasi‐undoped, our study also reveals that non‐negligible built‐in strain occurs in these samples. The level of built‐in strain varies significantly from one sample to another and can be estimated with accuracy from the correlation of the frequencies of the G and 2D Raman modes. Sample‐dependent compressive and tensile strains as high as 0.1% are reported.