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A highly selective electrochemical sensor for nifedipine based on layer‐by‐layer assembly films from polyaniline and multiwalled carbon nanotube
Author(s) -
Wang Qiguan,
Zhao Rongna,
Wang Sumin,
Guo Hao,
Li Jinhua,
Zhou Hongwei,
Wang Xinhai,
Wu Xinming,
Wang Yan,
Chen Weixing,
Zhang Wenzhi
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43452
Subject(s) - polyaniline , materials science , ascorbic acid , trisodium citrate , layer by layer , carbon nanotube , chemical engineering , electrochemistry , nanocomposite , nanotube , nanoparticle , electrode , layer (electronics) , nanotechnology , polymer , composite material , chemistry , food science , engineering , polymerization
ABSTRACT An uniformly distributed film consisting of polyaniline (PANI) nanoparticles and carboxylic acid functionalized multiwalled carbon nanotubes (MWNTs‐COOH) was successfully assembled on ITO plates from a layer‐by‐layer (LBL) method by using electrostatic interactions as the main driving force. The good conjugation between PANI nanoparticles and MWNTs‐COOH resulted in significant electrochemical performance variation of the obtained films. In addition, the assembled MWNT‐COOH/PANI/ITO showed synergistic effect to the electrochemical oxidation of nifedipine (NIF) when used as a sensor. Compared with bare ITO, the oxidation potential of NIF can be decreased about 170 mV on MWNT‐COOH/PANI/ITO, and the lower detection limit of NIF was as low as 1.0 × 10 −6 mol/L. In addition, the assembled electrode gave no responses to interferences such as glucose, urea, ascorbic acid, and trisodium citrate, which showed high selectivity for recognition and quantification of NIF. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43452.