Iwuoha, Emmanuel I., Williams-Dottin, Avril R., Hall, Lincoln A., Morrin, Aoife ORCID: 0000-0002-3031-4794, Mathebe, Gretta N., Smyth, Malcolm R. and Killard, Anthony J. ORCID: 0000-0001-6953-3655 (2004) Electrochemistry and application of a novel monosubstituted squarate electron-transfer mediator in a glucose oxidase-doped poly(phenol) sensor. Pure Applied Chemistry, 76 (4). pp. 789-799. ISSN 1365-3075
Abstract
Electrosynthetic poly(phenol) nanofilms were deposited in situ on platinum electrodes
in the presence and absence of glucose oxidase. The synthesis charges and currents of
the nonconducting polymer films were recorded at various applied potentials for films grown
from 25–100 mM phenol concentrations. Film parameters such as the standard rate constant
for film deposition, film thickness, and surface concentration of the poly(phenol) films were
evaluated from the cyclic and step voltammograms of the polymerization process. A novel
electron-transfer mediator consisting of monosubstituted 4-hydroxycyclobut-3-ene-1,2-dione
(squarate) was used as a mediator for Pt/poly(phenol) nano-film/GOx amperometric glucose
biosensors. Amperometric responses for 3-diphenylamino-4-hydroxycyclobut-3-ene-1,2-
dione (diphenylaminosquarate: E°′ = of +328 mV/Ag-AgCl at pH 7.0)-mediated systems
were measured by both steady-state amperometric and cyclic voltammetry. The sensor sensitivity
was calculated to be 558 nA cm
–2
(µM)
–1
.
Metadata
Item Type: | Article (Published) |
---|---|
Refereed: | Yes |
Additional Information: | Plenary lecture presented at the Inaugural Conference for the Southern and Eastern Africa Network of Analytical Chemists (SEANAC), Gaborone, Botswana, 7-10 July 2003 |
Subjects: | Physical Sciences > Analytical chemistry Physical Sciences > Electrochemistry Physical Sciences > Chemistry Biological Sciences > Biosensors Humanities > Biological Sciences > Biosensors |
DCU Faculties and Centres: | DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences Research Institutes and Centres > National Centre for Sensor Research (NCSR) |
Publisher: | International Union of Pure and Applied Chemistry |
Official URL: | http://dx.doi.org/10.1351/pac200476040789 |
ID Code: | 55 |
Deposited On: | 08 Nov 2006 by DORAS Administrator . Last Modified 26 Oct 2018 09:27 |
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