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An electrochemical biosensor based on conductive colloid particles self‐assembled from poly(3‐thiophenecarboxylic acid) and chitosan
Author(s) -
Zhang R.,
Wang L.,
Zhang C.,
Yang R.,
Sun X.,
Song B.,
Wong C.P.,
Xu Y.
Publication year - 2018
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.46764
Subject(s) - biosensor , chitosan , detection limit , electrode , colloid , electrochemistry , materials science , chemical engineering , nanotechnology , electrical conductor , linear range , electron transfer , polymer chemistry , chemistry , chromatography , composite material , organic chemistry , engineering
A novel kind of conductive self‐assembled colloid particles (CPs) was prepared from poly(3‐thiophenecarboxylic acid) (PTPCA) and chitosan (CS) via electrostatic interaction and π–π interaction. The resultant CPs were then cast on the electrode surface to provide a platform for fabricating high‐sensitive biosensor. It should be noted that the good conductivity of PTPCA can accelerate the electron transfer and facilitate the signal transduction from the CP film to the underlying electrode. This advantage endowed the biosensor with high sensitivity for H 2 O 2 detection. Under the optimal conditions, a linear range from 1 × 10 −11 to 1 × 10 −5 mol L −1 with a detection limit of 3 × 10 −12 mol L −1 was obtained for H 2 O 2 detection. The biosensor can be used to detect H 2 O 2 in commercial disinfector with satisfactory results. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46764.