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Reference type: Journal
Authors: Su PG, Hung FC, Lin PH
Article Title: Fabrication, characterization and sensing properties of Cu(II) ion imprinted sol-gel thin film on QCM.
Publication date: 2012
Journal: Materials Chemistry and Physics
Volume: 135
Issue: (1)
Page numbers: 130-136.
DOI: 10.1016/j.matchemphys.2012.04.035
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0254058412004154

Abstract: 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 (APTS, 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
Template and target information: copper ion, Cu(II)
Author keywords: thin film, Sol-gel growth, Electrical characterization, Desorption

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