Enzymatic Biosensors Based on Carbon Nanotubes Paste Electrodes
- 18 January 2005
- journal article
- research article
- Published by Wiley in Electroanalysis
- Vol. 17 (1) , 73-78
- https://doi.org/10.1002/elan.200403121
Abstract
The performance of enzymatic biosensors based on the immobilization of different enzymes within a carbon nanotubes paste electrode (CNTPE) prepared by dispersion of multi‐wall carbon nanotubes (MWNT) and mineral oil is reported in this work. The strong electrocatalytic activity of carbon nanotubes towards the reduction of hydrogen peroxide and quinones and the oxidation of NADH have allowed an effective low‐potential amperometric determination of lactate, phenols, catechols and ethanol, in connection with the incorporation of lactate oxidase, polyphenol oxidase and alcohol dehydrogenase/NAD+, respectively, within the composite matrix. Compared to the analogous enzymatic CPEs, a great enhancement in the response is observed at the enzymatic CNTPEs. Therefore, highly sensitive lactate, phenols, catechols and alcohols biosensors without using any metal or redox mediator can be obtained with this new composite material.Keywords
This publication has 20 references indexed in Scilit:
- A comparison between the use of a redox mediator in solution and of surface modified electrodes in the electrocatalytic oxidation of nicotinamide adenine dinucleotideBioelectrochemistry, 2004
- Detection of homocysteine at carbon nanotube paste electrodesTalanta, 2004
- Adsorption and electrooxidation of nucleic acids at carbon nanotubes paste electrodesElectrochemistry Communications, 2004
- Myoglobin on multi-walled carbon nanotubes modified electrode: direct electrochemistry and electrocatalysisElectrochemistry Communications, 2003
- Carbon nanotubes paste electrodeElectrochemistry Communications, 2003
- Solubilization of Carbon Nanotubes by Nafion toward the Preparation of Amperometric BiosensorsJournal of the American Chemical Society, 2003
- Carbon Nanotubes--the Route Toward ApplicationsScience, 2002
- Direct Electrochemistry of Cytochrome c at a Glassy Carbon Electrode Modified with Single-Wall Carbon NanotubesAnalytical Chemistry, 2002
- Carbon nanotube electrode for oxidation of dopamineBioelectrochemistry and Bioenergetics, 1996
- Biocatalysis with polyphenol oxidase: a reviewCatalysis Today, 1994