Please use this identifier to cite or link to this item: https://doi.org/10.1021/nn800459e
Title: Uniaxial strain on graphene: Raman spectroscopy study and band-gap opening
Authors: Ni, Z.H.
Yu, T.
Lu, Y.H. 
Wang, Y.Y.
Feng, Y.P. 
Shen, Z.X.
Keywords: Band gap
Flexible substrate
Graphene
Raman
Strain
Issue Date: Nov-2008
Citation: Ni, Z.H., Yu, T., Lu, Y.H., Wang, Y.Y., Feng, Y.P., Shen, Z.X. (2008-11). Uniaxial strain on graphene: Raman spectroscopy study and band-gap opening. ACS Nano 2 (11) : 2301-2305. ScholarBank@NUS Repository. https://doi.org/10.1021/nn800459e
Abstract: Graphene was deposited on a transparent and flexible substrate, and tensile strain up to ∼0.8% was loaded by stretching the substrate in one direction. Raman spectra of strained graphene show significant red shifts of 2D and G band (- 27.8 and - 14.2 cm -1 per 1% strain, respectively) because of the elongation of the carbon-carbon bonds. This indicates that uniaxial strain has been successfully applied on graphene. We also proposed that, by applying uniaxial strain on graphene, tunable band gap at K point can be realized. First-principle calculations predicted a band-gap opening of ∼300 meV for graphene under 1% uniaxial tensile strain. The strained graphene provides an alternative way to experimentally tune the band gap of graphene, which would be more efficient and more controllable than other methods that are used to open the band gap in graphene. Moreover, our results suggest that the flexible substrate is ready for such a strain process, and Raman spectroscopy can be used as an ultrasensitive method to determine the strain. © 2008 American Chemical Society.
Source Title: ACS Nano
URI: http://scholarbank.nus.edu.sg/handle/10635/98515
ISSN: 19360851
DOI: 10.1021/nn800459e
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