title: Amperometric Non-Enzymatic Hydrogen Peroxide Sensor Based on Aligned Zinc Oxide Nanorods.
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.
authors.affiliation: School of Applied Physics, Faculty of Science &amp; Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia. naif@ukm.edu.my.
authors.forename: Naif H
authors.initials: NH
authors.lastname: Al-Hardan
authors.affiliation: School of Applied Physics, Faculty of Science &amp; Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia. azmi@ukm.edu.my.
authors.forename: Muhammad Azmi
authors.initials: MA
authors.lastname: Abdul Hamid
authors.affiliation: School of Applied Physics, Faculty of Science &amp; Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia. linda@ukm.edu.my.
authors.forename: Roslinda
authors.initials: R
authors.lastname: Shamsudin
authors.affiliation: School of Applied Physics, Faculty of Science &amp; Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia. insan@ukm.edu.my.
authors.forename: Norinsan Kamil
authors.initials: NK
authors.lastname: Othman
authors.affiliation: School of Applied Physics, Faculty of Science &amp; Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia. karkeng.iamkklim@gmail.com.
authors.forename: Lim
authors.initials: L
authors.lastname: Kar Keng
keywords: hydrogen peroxide; nanorods; non-enzymatic biosensor; zinc oxide