期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 135, 期 1, 页码 130-136出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.04.035
关键词
Thin film; Sol-gel growth; Electrical characterization; Desorption
资金
- National Science Council of Taiwan [NSC 98-2113-M-034-001-MY2, NSC 100-2113-M-034-001-MY3]
Cu(II)-molecularly imprinted sol-gel films (Cu(II)-MISGF), coated on a quartz crystal microbalance (QCM) chip, were fabricated using a sol-gel procedure. Co-hydrolysis and co-condensation of Cu(II) (templates), 3-aminopropyltrimethoxysilane (AM'S, functional monomer) and tetraethoxysilane (TEOS, cross-linking agent) were performed with acid and base catalysis. The properties of the Cu(II)-MISGF were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and the electrochemical methods of cyclic voltammetry (CV). Microstructural observations revealed that the acid-catalyzed system yielded more mechanically stable thin films. A combined Cu(II)-MISGF-QCM with flow injection analysis (FIA) method was utilized to investigate the sensing performance of the Cu(II)-MISGF, with special emphasis on the most important properties of sensitivity, selectivity and response time. The Cu(II)-MISGF-QCM sensor, at a TEOS/APTS molar ratio of 10, exhibited excellent selectivity and rapidly responded to Cu(II) ions. (C) 2012 Elsevier B.V. All rights reserved.
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