Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 194, Issue -, Pages 94-100Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2015.01.001
Keywords
Non-enzymatic glucose sensor; Co3O4 nanowires; Template assisted hydrothermal synthesis; Amperometry; Ethylene glycol
Funding
- International Science Programme (IPPS), Uppsala University, Sweden [CAM:01]
- Royal University of Phnom Penh (RUPP), Cambodia
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In the work reported herein the ethylene glycol template assisted hydrothermal synthesis, onto Au substrate, of thin and highly dense cobalt oxide (Co3O4) nanowires and their characterization and their application for non-enzymatic glucose sensing are reported. The structure and composition of Co3O4 nanowires have been fully characterized using scanning electron microscopy, X-ray diffraction, high resolution transmission electron microscopy and X-ray photoelectron spectroscopy. The synthesized Co3O4 nanowires resulted to have high purity and showed diameter of approximately 10 nm. The prepared Co3O4 nanowires coated gold electrodes were applied to the non-enzymatic detection of glucose. The developed sensor showed high sensitivity (4.58 x 10(1) mu A mM(-1) cm(-2)), a wide linear range of concentration (1.00 x 10(-4)-1.2 x 10(1) mM) and a detection limit of 2.65 x 10(-5) mM. The developed glucose sensor has also shown to be very stable and selective over interferents such as uric acid and ascorbic acid. Furthermore, the proposed fabrication process was shown to be highly reproducible response (over nine electrodes). (C) 2015 Elsevier B.V. All rights reserved.
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