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Reference type: Journal
Authors: Lee SW, Takahara N, Korposh S, Yang DH, Kunitake T
Article Title: A Novel Mass-Sensitive Sensor Based on beta-Cyclodextrin-Anchored Bisphenol A-Imprinted TiO(2) Ultrathin Layers.
Publication date: 2011
Journal: Sensors and Materials
Volume: 23
Issue: (4)
Page numbers: 229-236.
Alternative URL: http://www.myu-inc.jp/myukk/S&M/

Abstract: A novel approach to fabricating artificial receptors based on the synergic effect of molecular imprinting and host (beta-cyclodextrin)-guest (bisphenol A, BPA.) interaction in TiO(2) ultrathin films prepared by the gas-phase surface sol-gel process was reported. Quartz crystal microbalance (QCM) electrodes were used to confirm the mass-sensitive change due to BPA incorporation and guest binding into the film with the aim of developing a BPA sensor. The concentration of 1 μM (272 ppb) BPA was successfully measured and the limit of detection was estimated to be 0.1 μM (27.2 ppb) BPA. The affinity of the imprinted film to BPA, which was calculated using a Benesi-Hildebrand plot, was ca. 8 times higher than that of the nonimprinted film. This selective binding feature in principle can be applied to more complex organic compounds
Template and target information: bisphenol A, BPA
Author keywords: molecular imprinting, surface sol-gel process, Cyclodextrins (CDs), bisphenol A (BPA)

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