期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 130, 期 1, 页码 379-385出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2007.09.035
关键词
molecular imprinting; monosaccharides; TiO2 ultrathin film; surface sol-gel process
In this study, we extended the molecular imprinting capability of TiO2 gel to the monosaccharide family. Composite nanofilms were prepared from D-glucose and titanium n-butoxide, Ti(O-Bu-n)(4), on a QCM electrode by the surface sol-gel process. After the D-glucose template was removed, the binding behavior of the template and other monosaccharides (D-mannose, D-galactose and D-fructose) was examined by QCM measurement The D-glucose imprinted TiO2 gel film provided sensitively mass increases for monosaccharides. The largest binding was achieved with D-glucose, showing a maximal binding ratio of 2.3 (lambda=M-imp/Mnon-imp, mol/mol) between the imprinted and non-imprinted films. The other six-membered monosaccharide guests gave 44-68% binding efficiencies of that of D-glucose. It is concluded that the imprinted TiO2 gel film could efficiently discriminate the structure of monosaccharide isomers. (C) 2007 Elsevier B.V All rights reserved.
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