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Fabrication and Characterisation of the First Graphene Ring Micro Electrodes (GRIMEs)

Dickinson, James and Andrieux, Fabrice and Boxall, Colin (2012) Fabrication and Characterisation of the First Graphene Ring Micro Electrodes (GRIMEs). Materials Research Society Symposium Proceedings, 1407. ISSN 0272-9172

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Abstract

We report the fabrication and characterisation of the first graphene ring micro electrodes, formed by dip coating fibre optics with subsequently reduced graphite oxide. The behaviour of the so-formed Graphene RIng Micro Electrodes (GRIMEs) is studied using the ferricyanide probe redox system while electrode thicknesses is assessed using established electrochemical methods. A ring electrode of ∼73 nm thickness is produced on 220 μm diameter fibre optics, corresponding to an inner to outer radius ratio of >0.999, so allowing for use of extant analytical descriptions of very thin ring micro electrodes in data analysis. GRIMEs are highly reliable (current response invariant over >3000 scans) with the microring design allowing for efficient use of electrochemically active graphene edge sites. Further, the associated nA scale currents neatly obviate issues relating to the high resistivity of undoped graphene. Thus, the use of graphene in ring micro electrodes improves the reliability of existing micro electrode designs and expands the range of use of graphene-based electrochemical devices.

Item Type: Article
Journal or Publication Title: Materials Research Society Symposium Proceedings
Uncontrolled Keywords: nanostructure ; sensor ; electrical properties
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 60074
Deposited By: ep_importer_pure
Deposited On: 19 Nov 2012 08:55
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:35
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/60074

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