Please use this identifier to cite or link to this item: https://doi.org/10.4028/www.scientific.net/AMR.896.510
Title: Effect of oxygen plasma on the optical properties of monolayer graphene
Authors: Santoso, I.
Singh, R.S.
Gogoi, P.K.
Asmara, T.C.
Wei, D.C.
Chen, W. 
Wee, A.T.S. 
Pereira, V.M. 
Rusydi, A. 
Keywords: Disorder
Graphene
Interactions
Optical absorption
Spectroscopic ellipsometry
Issue Date: 2014
Citation: Santoso, I., Singh, R.S., Gogoi, P.K., Asmara, T.C., Wei, D.C., Chen, W., Wee, A.T.S., Pereira, V.M., Rusydi, A. (2014). Effect of oxygen plasma on the optical properties of monolayer graphene. Advanced Materials Research 896 : 510-513. ScholarBank@NUS Repository. https://doi.org/10.4028/www.scientific.net/AMR.896.510
Abstract: The significant alteration of absorption (A) of monolayer graphene under mild oxygen plasma exposure has been observed. The first important effect is the reduction of the excitonic resonance peak at 4.64 eV. Secondly, in the near infrared range, A is gradually suppressed below an exposure-dependent threshold in sense that A ≪ A0. Quantity A0 (given by πα and α is the fine structure constant) denotes constant absorption and relates to universal optical conductivity σ0. The suppression of A0 can be thought as the weakening of electron-hole interaction as displayed by the reduction of the excitonic resonance peak at 4.64 eV. The weakening of this interaction is due to the disorder introduced by the oxygen plasma exposure. © (2014) Trans Tech Publications, Switzerland.
Source Title: Advanced Materials Research
URI: http://scholarbank.nus.edu.sg/handle/10635/95455
ISBN: 9783038350316
ISSN: 10226680
DOI: 10.4028/www.scientific.net/AMR.896.510
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