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The band structure of graphene oxide examined using photoluminescence spectroscopy

Liang, HF, Smith, CTG, Mills, CA and Silva, SRP (2015) The band structure of graphene oxide examined using photoluminescence spectroscopy Journal of Materials Chemistry C, 3 (48). pp. 12484-12491.

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Abstract

Photoluminescence (PL) spectra have been used to elucidate the band structure of graphene oxide (GO) reduced in aqueous solution. The GO reduction is measured in situ via the identification of four PL peaks produced from GO solutions with different concentrations. Using corresponding UV-visible and photoluminescence excitation (PLE) spectroscopy, and on progressing from high energy to low energy transitions, the four PL peaks are identified as σ–σ* and π–π* transitions, a π band tail due to oxygen localized states, and a π band tail due to trapped water, respectively. The labeling of the band structure has been used to challenge the prevailing assignation of the low energy transitions, reported in the literature, to molecular σ–σ* and π–π* transitions alone.

Item Type: Article
Subjects : Chemical and Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
AuthorsEmailORCID
Liang, HFUNSPECIFIEDUNSPECIFIED
Smith, CTGUNSPECIFIEDUNSPECIFIED
Mills, CAUNSPECIFIEDUNSPECIFIED
Silva, SRPUNSPECIFIEDUNSPECIFIED
Date : 28 December 2015
Identification Number : https://doi.org/10.1039/c5tc00307e
Copyright Disclaimer : © The Royal Society of Chemistry 2015
Uncontrolled Keywords : Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Physics, Applied, Materials Science, Physics, GRAPHITE OXIDE, CHEMICAL-REDUCTION, THIN-FILMS, LAYER, GAP
Depositing User : Symplectic Elements
Date Deposited : 21 Feb 2017 16:12
Last Modified : 21 Feb 2017 16:12
URI: http://epubs.surrey.ac.uk/id/eprint/813587

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