Individually addressable recessed gold microelectrode arrays with monolayers of thio-cyclodextrin nanocavities

Grancharov, Georgy, Khosravi, Ezat, Wood, David, Turton, Andrew and Kataky, Ritu (2005) Individually addressable recessed gold microelectrode arrays with monolayers of thio-cyclodextrin nanocavities. The Analyst, 130 (10). pp. 1351-1357. ISSN 0003-2654

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Abstract

Four, individually addressable 30 mu m diameter, e-beam deposited, gold microelectrodes recessed by 6 mm were suitably spaced on a single substrate to avoid diffusional overlap between each microelectrode. The single substrate device was functionalised with thiolated alpha-, beta-, and gamma-cyclodextrin nanocavities without spacer groups to ensure close proximity of the cavities to the electrode surface. The microelectrodes were assessed in two stages. The e-beam deposited micron sized electrodes were characterized using models for recessed and inlaid microdisk electrodes. Subsequently, each individually addressable, atomically flat, micro-patterned gold electrode with thiolated CD ensembles was treated as a nanoporous electrode assembly. Theoretical and experimental results were compared using cyclic voltammetry. Atomic force microscopy was also used to characterise the modified microelectrodes. Comparisons were made with thiolated CDs deposited on macroelectrodes. This is the first report of the behaviour of immobilized CD nanocavities ensembles on atomically flat gold microelectrodes.

Item Type:	Article
Subjects:	F200 Materials Science
Department:	Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User:	Becky Skoyles
Date Deposited:	29 Mar 2018 14:20
Last Modified:	11 Oct 2019 21:18
URI:	http://nrl.northumbria.ac.uk/id/eprint/33890

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