期刊
ELECTROCHIMICA ACTA
卷 130, 期 -, 页码 361-367出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.03.035
关键词
Polypyrrole; Molecularly imprinted polymer; Nanocrystalline diamond (NCD); Electrochemical impedance spectroscopy; Theophylline
资金
- European Union Structural Funds project Postdoctoral Fellowship Implementation in Lithuania within the framework of the Measure for Enhancing Mobility of Scholars and Other Researchers
- Promotion of Student Research of the Program of Human Resources Development Action Plan [VP1-3.1-SMM-01]
- MERIDIAN [280778-2]
- FWO (Fonds voor Wetenschappelijk Onderzoek)
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. (C) 2014 Elsevier Ltd. All rights reserved.
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