NDLI: A highly sensitive non-enzymatic glucose sensor based on bimetallic Cu-Ag superstructures.

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A highly sensitive non-enzymatic glucose sensor based on bimetallic Cu-Ag superstructures.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Li, Hua Guo, Chun-Yan Xu, Cai-Ling
Description	Author Affiliation: Li H ( Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China. Electronic address: huali@lzu.edu.cn.); Guo CY ( Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.); Xu CL ( Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China. Electronic address: xucl@lzu.edu.cn.)
Abstract	Bimetallic Cu-Ag superstructures were successfully fabricated for the first time by using the natural leaves as reducing agent through a facile one-step hydrothermal process. Morphology, structure and composition of the Cu-Ag superstructures were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS) and inductively coupled plasma-optical emission spectroscopy (ICP-OES), respectively. The results reveal that the Cu-Ag superstructure is bimetallic nanocomposite constructed by nanoparticles with low Ag content and shows a rough surface and porous flexural algae-like microstructure. By using a three-dimensional nickel foam as the scaffold, a novel non-enzymatic glucose sensor based on Cu-Ag nanocomposites has been fabricated and applied to non-enzymatic glucose detection. The as-prepared Cu-Ag nanocomposites based glucose sensor displays distinctly enhanced electrocatalytic activity compared to those obtained with pure Cu nanomaterials prepared with a similar procedure, revealing a synergistic effect of the matrix Cu and the doped Ag. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy indicate that the Cu-Ag superstructures based glucose sensor displays a fascinating sensitivity up to 7745.7 µA mM(-1) cm(-2), outstanding detection limit of 0.08 µM and fast amperometric response (<2 s) for glucose detection. Furthermore, the sensor also exhibits significant selectivity, excellent stability and reproducibility, as well as attractive feasibility for real sample analysis. Because of its excellent electrochemical performance, low cost and easy preparation, this novel electrode material is a promising candidate in the development of non-enzymatic glucose sensor.
ISSN	09565663
Volume Number	63
e-ISSN	18734235
Journal	Biosensors and Bioelectronics
Language	English
Publisher	Elsevier
Publisher Date	2015-01-15
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biosensing Techniques Electrochemical Techniques Glucose Isolation & Purification Nanoparticles Chemistry Copper Gold Limit Of Detection Nanocomposites X-ray Diffraction Journal Article Research Support, Non-u.s. Gov't Discipline Biotechnology
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry

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