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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.

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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
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Created: Mon, 05 Dec 2011, 12:31:01 EST