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Direct electro-deposition of graphene from aqueous suspensions Hilder, Matthias, Winther-Jensen, Bjorn, Li, Dan, Forsyth, Maria and MacFarlane, Douglas R. 2011, Direct electro-deposition of graphene from aqueous suspensions, Physical chemistry chemical physics, vol. 13, no. 20, pp. 9187-9193. Attached Files Name Description MIMEType Size Downloads Title Direct electro-deposition of graphene from aqueous suspensions Author(s) Hilder, Matthias Winther-Jensen, Bjorn Li, Dan Forsyth, Maria MacFarlane, Douglas R. Journal name Physical chemistry chemical physics Volume number 13 Issue number 20 Start page 9187 End page 9193 Publisher Royal Society of Chemistry Place of publication Cambridge, U. K. Publication date 2011 ISSN 1463-9076 1463-9084 Summary We describe the direct electro-chemical reduction of graphene oxide to graphene from aqueous suspension by applying reduction voltages exceeding -1.0 to -1.2 V. The conductivity of the deposition medium is of crucial importance and only values between 4-25 mS cm-1 result in deposition. Above 25 mS cm-1 the suspension de-stabilises while conductivities below 4 mS cm-1 do not show a measurable deposition rate. Furthermore, we show that deposition can be carried out over a wide pH region ranging from 1.5 to 12.5. The electro-deposition process is characterised in terms of electro-chemical methods including cyclic voltammetry, quartz crystal microbalance, impedance spectroscopy, constant amperometry and potentiometric titrations, while the deposits are analysed via Raman spectroscopy, infra-red spectroscopy, X-ray photoelectron spectroscopy and X-ray diffractometry. The determined oxygen contents are similar to those of chemically reduced graphene oxide, and the conductivity of the deposits was found to be ~20 S cm -1. Language eng Field of Research 030699 Physical Chemistry not elsewhere classified Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2011, The Owner Societies Persistent URL http://hdl.handle.net/10536/DRO/DU:30040351 Document type: Journal Article Collection: Centre for Material and Fibre Innovation Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 05 Dec 2011, 12:31:01 EST Tue, 13 Dec 2011, 13:59:43 EST Tue, 13 Dec 2011, 14:02:05 EST Tue, 15 May 2012, 16:54:41 EST Wed, 16 May 2012, 09:44:39 EST Mon, 17 Jun 2013, 17:07:05 EST Filtered Full Citation counts:   Cited 26 times in TR Web of Science Cited 30 times in Scopus Search Google Scholar Access Statistics: 84 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Mon, 05 Dec 2011, 12:31:01 EST

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