Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 176, Issue -, Pages 952-959Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.09.076
Keywords
CuS nanotubes; In situ; Nonenzymatic; Glucose sensor
Funding
- Specialized Research Fund for Instrument Program of National Natural Science Foundation of China [20927007]
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In this report, a sensitive nonenzymatic glucose sensor based on CuS nanotube (CuS NTs) was fabricated. CuS NTs made up of CuS nanoparticles were successfully in situ synthesized on Cu electrode by a simple self-sacrificial template method. The morphology and crystallinity of CuS NTs were characterized by scanning electron microscopy (SEM), transmission spectroscopy (TEM) and X-ray diffraction (XRD). The electrochemical property of CuS NTs modified Cu electrode (CuS NTs/Cu) for glucose electrooxidation was thoroughly investigated by cyclic voltammetry and amperometric methods. The CuS NTs based glucose sensor exhibited an extraordinary detection limit as low as 45 nM (S/N = 3) and two wide linear ranges. A lower glucose concentration ranged from 0.2 mu M to 2.5 mM with high sensitivity of 3135 mu A mM(-1) cm(-2) and a higher glucose concentration ranged from 2.5 mM to 6 mM with relative low sensitivity of 2205 mu A mM(-1) cm(-2). Furthermore, the proposed sensor also showed high anti-interference ability and was successfully used for glucose detecting in human serum with good accuracy and satisfactory recovery. This work had demonstrated a simple and effective sensing platform based on CuS NTs for nonenzymatic glucose detection. (C) 2012 Elsevier B. V. All rights reserved.
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