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Authors: Ratautaite V, Janssens SD, Haenen K, Nesládek M, Ramanaviciene A, Baleviciute I, Ramanavicius A
Article Title: Molecularly Imprinted Polypyrrole Based Impedimentric Sensor for Theophylline Determination.
Publication date: 2014
Journal: Electrochimica Acta
Volume: 130
Page numbers: 361-367.
DOI: 10.1016/j.electacta.2014.03.035
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0013468614005337
Abstract: In this study development of impedimetric sensor based on oxygen terminated boron-doped nanocrystalline diamond (B:NCD:O) modified with theophylline imprinted polypyrrole is described. Hydrogen peroxide induced chemical formation of polypyrrole molecularly imprinted by theophylline was applied for the modification of conducting silicon substrate covered by B:NCD:O film. Non-imprinted polypyrrole layer was formed on similar substrate in order to prove efficiency of imprinted polypyrrole. Electrochemical impedance spectroscopy was applied for the evaluation of analyte-induced changes in electrochemical capacitance/resistance. The impact of polymerization duration on the capacitance of impedimetric sensor was estimated. A different impedance behavior was observed at different ratio of polymerized monomer and template molecule in the polymerization media. The influence of ethanol as additive to polymerization media on registered changes in capacitance/resistance was evaluated. Degradation of sensor stored in buffer solution was evaluated
Template and target information: theophylline
Author keywords: polypyrrole, molecularly imprinted polymer, Nanocrystalline diamond (NCD), electrochemical impedance spectroscopy, theophylline
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