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Reference type: Journal
Authors: Takahara N, Wang T, Lee SW
Article Title: Selective Adsorption of Molecules by Imprinted Titania Nanohybrid Thin Films with Anchored Cyclodextrin Host Molecules.
Publication date: 2013
Journal: Kobunshi Ronbunshu
Volume: 70
Issue: (5)
Page numbers: 214-220.
DOI: 10.1295/koron.70.214

Abstract: A novel combination of cyclodextrin hosts and imprinting effects in TiO2 gel ultrathin layers prepared by the gas-phase surface sol-gel process was demonstrated. For bisphenol A (BPA) imprinting in TiO2 films, a complex of β-CD/BPA (from 1:1 to 3:1) and Ti(O-nBu)4 were alternately deposited on a quartz crystal microbalance (QCM) electrode, and then the BPA template was removed by washing with ethanol. The film formation and sensing ability of the TiO2/(β-CD/BPA) films were confirmed by QCM frequency measurements. The imprinted TiO2/(β-CD/BPA, 2:1) film showed about 7 times higher selectivity than the non-imprinted TiO2/β-CD film, showing a sensitivity lower than 50 ppb to BPA. The present approach has potential for the detection of a variety of organic compounds in liquids and gases
Template and target information: bisphenol A, BPA
Author keywords: Gas-Phase Surface Sol-Gel Process, molecular imprinting, cyclodextrin, bisphenol A (BPA)

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