Thomas, Helen R., Vallés, Cristina, Young, Robert J. (Robert Joseph), Kinloch, Ian A., Wilson, Neil R. and Rourke, Jonathan (2013) Identifying the fluorescence of graphene oxide. Journal of Materials Chemistry C, Volume 1 (Number 2). pp. 338-342. doi:10.1039/c2tc00234e

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Abstract

Treatment of graphene oxide (GO) with sodium hydroxide separates the material into two components: a colourless, but highly fluorescent, oxidative debris and a darker non-fluorescent material containing the graphene-like sheets. The as-produced GO shows a weak, broad photo-luminescence while the oxidative debris fluoresces more intensely, blue-shifted relative to the as-produced GO, with a dispersive emission profile shifting to lower wavelength as the excitation wavelength is decreased. Such excitation wavelength dependent photoluminescence is characteristic of ensembles of nanometre-sized carbon based fluorophores. By contrast, analysis of the fluorescence as a function of excitation wavelength for as-produced graphene oxide shows a single non-dispersive peak, consistent with broadening of the emission from a single species rather than an ensemble of quantum dots within the graphene sheet.

Item Type:	Journal Article
Divisions:	Faculty of Science > Chemistry Faculty of Science > Physics
Journal or Publication Title:	Journal of Materials Chemistry C
Publisher:	Royal Society of Chemistry
ISSN:	2050-7526
Official Date:	25 October 2013
Dates:	Date Event 25 October 2013 Published
Volume:	Volume 1
Number:	Number 2
Page Range:	pp. 338-342
DOI:	10.1039/c2tc00234e
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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