Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/7777
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dc.contributor.authorPauliukaite, Rasa-
dc.contributor.authorGhica, Mariana-
dc.contributor.authorBarsan, Madalina-
dc.contributor.authorBrett, Christopher-
dc.date.accessioned2009-02-17T10:33:12Z-
dc.date.available2009-02-17T10:33:12Z-
dc.date.issued2007en_US
dc.identifier.citationJournal of Solid State Electrochemistry. 11:7 (2007) 899-908en_US
dc.identifier.urihttp://hdl.handle.net/10316/7777-
dc.description.abstractAbstract The polymer redox mediator, poly(neutral red) (PNR), has been synthesised and characterised electrochemically to investigate the best electropolymerisation and mediation conditions for application in enzyme biosensors and to clarify the mechanism of action. Neutral red was electropolymerised by potential cycling on carbon film electrode substrates by allowing the monomer to be oxidised during the full 20 cycles of polymerisation or reducing the positive limit of the potential window after the first 2 cycles to impede monomer oxidation with a view to obtaining longer polymer chains and a lesser degree of branching. Comparison was made with glassy carbon substrates. The PNR films on carbon film electrodes were characterised using cyclic voltammetry and electrochemical impedance spectroscopy, as well as in glucose biosensors prepared with PNR. Glucose oxidase enzyme was immobilised by encapsulation in silica sol-gel and compared with that obtained by cross-linking with glutaraldehyde. The biosensors were evaluated by chronoamperometry in 0.1 M phosphate buffer saline solution, pH 7.0, and showed evidence of electron transfer between the enzyme cofactor flavin adenine dinucleotide and PNR dissolved in the enzyme layer competing with PNR-mediated electrochemical degradation of H2O2 formed during the enzymatic process.en_US
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleCharacterisation of poly(neutral red) modified carbon film electrodes; application as a redox mediator for biosensorsen_US
dc.typearticleen_US
dc.identifier.doi10.1007/s10008-007-0281-9en_US
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.languageiso639-1en-
crisitem.author.researchunitCentre for Mechanical Engineering-
crisitem.author.researchunitCentre for Mechanical Engineering-
crisitem.author.orcid0000-0002-1590-0816-
crisitem.author.orcid0000-0002-8492-5558-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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