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Int. J. Mol. Sci. 2016, 17(7), 1104; doi:10.3390/ijms17071104

Bacteria-Templated NiO Nanoparticles/Microstructure for an Enzymeless Glucose Sensor

1
Department of Chemistry and Biochemistry, National Chung Cheng University, 168 University Road, Min-Hsiung, Chia-Yi 62102, Taiwan
2
Department of Chemical Engineering & Materials Science, Yuan Ze University. No. 135 Yuandong Road, Zhongli District, Taoyuan City 320, Taiwan
3
Department of Earth and Environmental Sciences, National Chung Cheng University, 168 University Road, Min-Hsiung, Chia-Yi 62102, Taiwan
*
Authors to whom correspondence should be addressed.
Academic Editor: Vladimir Sivakov
Received: 3 June 2016 / Revised: 24 June 2016 / Accepted: 28 June 2016 / Published: 11 July 2016
(This article belongs to the Special Issue Inorganic Nanostructures in Biological Systems)
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Abstract

The bacterial-induced hollow cylinder NiO (HCNiO) nanomaterial was utilized for the enzymeless (without GOx) detection of glucose in basic conditions. The determination of glucose in 0.05 M NaOH solution with high sensitivity was performed using cyclic voltammetry (CV) and amperometry (i–t). The fundamental electrochemical parameters were analyzed and the obtained values of diffusion coefficient (D), heterogeneous rate constant (ks), electroactive surface coverage (Г), and transfer coefficient (alpha-α) are 1.75 × 10−6 cm2/s, 57.65 M−1·s−1, 1.45 × 10−10 mol/cm2, and 0.52 respectively. The peak current of the i–t method shows two dynamic linear ranges of calibration curves 0.2 to 3.5 µM and 0.5 to 250 µM for the glucose electro-oxidation. The Ni2+/Ni3+ couple with the HCNiO electrode and the electrocatalytic properties were found to be sensitive to the glucose oxidation. The green chemistry of NiO preparation from bacteria and the high catalytic ability of the oxyhydroxide (NiOOH) is the good choice for the development of a glucose sensor. The best obtained sensitivity and limit of detection (LOD) for this sensor were 3978.9 µA mM−1·cm−2 and 0.9 µM, respectively. View Full-Text
Keywords: hollow cylinder NiO (HCNiO) nanostructure; glassy carbon electrode (GCE); non-enzymatic glucose sensor; electrochemical sensing; electrocatalysis; amperometric sensors hollow cylinder NiO (HCNiO) nanostructure; glassy carbon electrode (GCE); non-enzymatic glucose sensor; electrochemical sensing; electrocatalysis; amperometric sensors
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Vaidyanathan, S.; Cherng, J.-Y.; Sun, A.-C.; Chen, C.-Y. Bacteria-Templated NiO Nanoparticles/Microstructure for an Enzymeless Glucose Sensor. Int. J. Mol. Sci. 2016, 17, 1104.

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