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Sensors 2016, 16(7), 1004; doi:10.3390/s16071004

Amperometric Non-Enzymatic Hydrogen Peroxide Sensor Based on Aligned Zinc Oxide Nanorods

School of Applied Physics, Faculty of Science & Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia
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Academic Editor: Roberto Pilloton
Received: 28 April 2016 / Revised: 14 June 2016 / Accepted: 15 June 2016 / Published: 29 June 2016
(This article belongs to the Special Issue Amperometric Biosensors)
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Abstract

Zinc oxide (ZnO) nanorods (NRs) have been synthesized via the hydrothermal process. The NRs were grown over a conductive glass substrate. A non-enzymatic electrochemical sensor for hydrogen peroxide (H2O2), based on the prepared ZnO NRs, was examined through the use of current-voltage measurements. The measured currents, as a function of H2O2 concentrations ranging from 10 μM to 700 μM, revealed two distinct behaviours and good performance, with a lower detection limit (LOD) of 42 μM for the low range of H2O2 concentrations (first region), and a LOD of 143.5 μM for the higher range of H2O2 concentrations (second region). The prepared ZnO NRs show excellent electrocatalytic activity. This enables a measurable and stable output current. The results were correlated with the oxidation process of the H2O2 and revealed a good performance for the ZnO NR non-enzymatic H2O2 sensor. View Full-Text
Keywords: non-enzymatic biosensor; zinc oxide; nanorods; hydrogen peroxide non-enzymatic biosensor; zinc oxide; nanorods; hydrogen peroxide
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MDPI and ACS Style

Al-Hardan, N.H.; Abdul Hamid, M.A.; Shamsudin, R.; Othman, N.K.; Kar Keng, L. Amperometric Non-Enzymatic Hydrogen Peroxide Sensor Based on Aligned Zinc Oxide Nanorods. Sensors 2016, 16, 1004.

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