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Enhancement of a conducting polymer-based biosensor using carbon nanotube-doped polyaniline.

Morrin, Aoife and Luo, Xiliang and Killard, Anthony J. and Smyth, Malcolm R. (2006) Enhancement of a conducting polymer-based biosensor using carbon nanotube-doped polyaniline. In: ESEAC 2006, Eleventh International Conference on Electroanalysis, 11-15 June 2006, Bordeaux, France.

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Abstract

A biosensor with improved performance was developed through the immobilization of horseradish peroxidase (HRP) onto electropolymerized polyaniline (PANI) films doped with carbon nanotubes (CNTs). The effects of electropolymerization cycle and CNT concentration on the response of the biosensor toward H2O2 were investigated. It was found that the integration of CNTs into the biosensor system could increase the amount and stability of immobilized enzyme, and greatly enhance the biosensor response. Compared with the biosensor fabricated without CNTs, the proposed biosensor exhibited enhanced stability and approximately eight-fold higher sensitivity. A linear range from 0.2 to 19μM for the detection of H2O2 was observed, with a detection limit of 68 nM at a signal-to-noise ratio of 3 and a response time of less than 5s.

Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:No
Uncontrolled Keywords:Horseradish Peroxidase (HRP); Electropolymerized Polyaniline (PANI) films
Subjects:Physical Sciences > Chemistry
Biological Sciences > Biosensors
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:19850
Deposited On:27 Mar 2014 11:15 by Aoife Morrin. Last Modified 09 Nov 2016 14:49

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