Journal
MICROCHIMICA ACTA
Volume 183, Issue 2, Pages 791-797Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-015-1717-z
Keywords
Metformin; Bimetallic structures; Cyclic voltammetry; High-resolution TEM; Annular dark-field scanning TEM
Categories
Funding
- National Natural Science Foundation of China [21475118, 21175118, 21275130]
- Zhejiang province of undergraduate scientific and technological innovation project (New Talents Program) [2015404004]
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Bimetallic gold-copper nanochain networks (AuCu NCNs) were prepared by a single-step wet-chemical approach using metformin as a growth-directing agent. The formation mechanism was investigated in detail, and the AuCu NCNs were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The nanocrystals were deposited on glassy carbon electrode and this resulted in a highly sensitive sensor for nitrite. Features include a low working potential (best at 0.684 V vs. SCE), fair sensitivity (17.55 mu A mM(-1)), a wide linear range (0.01 to 4.0 mM), a low detection limit (0.2 mu M, S/N = 3), and superior selectivity as compared to other sensors.
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