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Title: Development of electrochemical oxidase biosensors based on carbon nanotube-modified carbon film electrodes for glucose and ethanol
Authors: Gouveia-Caridade, Carla 
Pauliukaite, Rasa 
Brett, Christopher M.A. 
Keywords: Multi-walled carbon nanotubes; Carbon film electrodes; Glucose oxidase; Alcohol oxidase; Electrochemical biosensor
Issue Date: 2008
Citation: Electrochimica Acta. 53:23 (2008) 6732-6739
Abstract: Functionalised multi-walled carbon nanotubes (MWCNTs) were cast on glassy carbon (GC) and carbon film electrodes (CFE), and were characterised electrochemically and applied in a glucose-oxidase-based biosensor. MWCNT-modified carbon film electrodes were then used to develop an alcohol oxidase (AlcOx) biosensor, in which AlcOx-BSA was cross-linked with glutaraldehyde and attached by drop-coating. The experimental conditions, applied potential and pH, for ethanol monitoring were optimised, and ethanol was determined amperometrically at -0.3 V vs. SCE at pH 7.5. Electrocatalytic effects of MWCNT were observed with respect to unmodified carbon film electrodes. The sensitivity obtained was 20 times higher at carbon film/MWCNT-based biosensors than without MWCNT.
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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