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Tin Oxide Nanorod Array-Based Electrochemical Hydrogen Peroxide Biosensor

Liu, Jinping and Li, Yuanyuan and Huang, Xintang and Zhu, Zhihong (2010) Tin Oxide Nanorod Array-Based Electrochemical Hydrogen Peroxide Biosensor. Nanoscale Research Letters, 5 (7). pp. 1177-1181.

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Official URL: http://www.springerlink.com/content/a7264v1253k827...

Abstract

SnO2 nanorod array grown directly on alloy substrate has been employed as the working electrode of H2O2 biosensor. Single-crystalline SnO2 nanorods provide not only low isoelectric point and enough void spaces for facile horseradish peroxidase (HRP) immobilization but also numerous conductive channels for electron transport to and from current collector; thus, leading to direct electrochemistry of HRP. The nanorod array-based biosensor demonstrates high H2O2 sensing performance in terms of excellent sensitivity (379 μA mM−1 cm−2), low detection limit (0.2 μM) and high selectivity with the apparent Michaelis–Menten constant estimated to be as small as 33.9 μM. Our work further demonstrates the advantages of ordered array architecture in electrochemical device application and sheds light on the construction of other high-performance enzymatic biosensors.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9368
Deposited By:JNCASR
Deposited On:30 Sep 2010 09:22
Last Modified:30 Sep 2010 09:22

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