Amperometric Tyrosinase Biosensor Based on Carbon Nanotube-Doped Sol-Gel-Derived Zinc Oxide-Nafion Composite Films

A highly sensitive amperometric tyrosinase biosensor has been developed based on mesoporous composite films of carbon nanotube (CNT)–ZnO–Nafion composite film encapsulating tyrosinase on a glassy carbon electrode. Due to the mesoporous nature (diameter: 3.17 nm) of the composite film, the biosensor...

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Published in:Electroanalysis (New York, N.Y.) N.Y.), 2011-04, Vol.23 (4), p.962-970
Main Authors: Lee, Joong Min, Xu, Guang-Ri, Kim, Byung Kun, Choi, Han Nim, Lee, Won-Yong
Format: Article
Language:English
Subjects:
Biosensor
Biosensors
Carbon
Carbon nanotube
Electrical measurements
Electrodes
Nanostructure
Phenol
Tyrosinase
Zinc
ZnO-Nafion composite
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creator Lee, Joong Min
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description A highly sensitive amperometric tyrosinase biosensor has been developed based on mesoporous composite films of carbon nanotube (CNT)–ZnO–Nafion composite film encapsulating tyrosinase on a glassy carbon electrode. Due to the mesoporous nature (diameter: 3.17 nm) of the composite film, the biosensor exhibits very fast response time of 2 s. The present biosensor shows an excellent sensitivity of 766 mA/M and a detection limit of 4.7×10−8 M (S/N=3) for phenol. The biosensor retains 88 % of its initial activity after 2 weeks of storage in 50 mM phosphate buffer at pH 7.0. The present biosensor exhibits good recovery for the spiked phenol in an industrial waste water sample.
doi_str_mv 10.1002/elan.201000556
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1521-4109
1521-4109
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subjects Biosensor
Biosensors
Carbon
Carbon nanotube
Electrical measurements
Electrodes
Nanostructure
Phenol
Tyrosinase
Zinc
ZnO-Nafion composite
title Amperometric Tyrosinase Biosensor Based on Carbon Nanotube-Doped Sol-Gel-Derived Zinc Oxide-Nafion Composite Films
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