Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/12882
DC FieldValueLanguage
dc.contributor.authorBarsan, Madalina M.-
dc.contributor.authorPinto, Edilson M.-
dc.contributor.authorFlorescu, Monica-
dc.contributor.authorBrett, Christopher M. A.-
dc.date.accessioned2010-03-12T13:55:17Z-
dc.date.available2010-03-12T13:55:17Z-
dc.date.issued2009-03-02-
dc.identifier.citationAnalytica Chimica Acta. 635:1 (2009) 71-78en_US
dc.identifier.issn0003-2670-
dc.identifier.urihttp://hdl.handle.net/10316/12882-
dc.description.abstractA new conducting composite flexible material prepared from cellulose acetate (CA) polymer and graphite has been developed and used for the fabrication of electrodes, which were then characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Scanning electron microscopy (SEM) was used to provide information concerning the morphology of the composite electrode surface. The potential window, background currents and capacitance were evaluated by cyclic voltammetry in the pH range from 4.6 to 8.2. The voltammetry of model electroactive species demonstrates a close to reversible electrochemical behaviour, under linear diffusion control. The electroactive area of the composite electrodes increases after appropriate electrode polishing and electrochemical pre-treatment. The electrodes were used as substrate for the electropolymerisation of the phenazine dye neutral red, for future use as redox mediator in electrochemical biosensors. The composite electrodes were also successfully used for the amperometric detection of ascorbate at 0.0 V vs. SCE, and applied to the measurement of ascorbate in Vitamin C tablets; the sensor exhibits high sensitivity and a low detection limit of 7.7 [mu]M. Perspectives for use as a versatile, mechanically flexible and robust composite electrode of easily adaptable dimensions are indicateden_US
dc.language.isoengen_US
dc.publisherElsevier B.V.en_US
dc.rightsopenAccessen_US
dc.subjectGraphiteen_US
dc.subjectCellulose acetateen_US
dc.subjectComposite electrodeen_US
dc.subjectNeutral reden_US
dc.subjectAscorbateen_US
dc.titleDevelopment and characterization of a new conducting carbon composite electrodeen_US
dc.typearticleen_US
item.languageiso639-1en-
item.fulltextCom Texto completo-
item.grantfulltextopen-
crisitem.author.researchunitCentre for Mechanical Engineering-
crisitem.author.orcid0000-0002-8492-5558-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
Development and characterization of a new conducti.pdf1.02 MBAdobe PDFView/Open
Show simple item record

Page view(s)

274
checked on Oct 15, 2020

Download(s)

131
checked on Oct 15, 2020

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.