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

Grancharov, G.; Khosravi, E.; Wood, D.; Turton, A.; Kataky, R.

Authors

G. Grancharov

E. Khosravi

D. Wood

A. Turton



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.

Citation

Grancharov, G., Khosravi, E., Wood, D., Turton, A., & Kataky, R. (2005). Individually addressable recessed gold microelectrode arrays with monolayers of thio-cyclodextrin nanocavities. Analyst, 130(10), 1351-1357. https://doi.org/10.1039/b506367a

Journal Article Type Article
Publication Date Aug 1, 2005
Deposit Date May 3, 2007
Journal Analyst
Print ISSN 0003-2654
Electronic ISSN 1364-5528
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 130
Issue 10
Pages 1351-1357
DOI https://doi.org/10.1039/b506367a