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Ion exchanged polypyrrole‐based glucose biosensor: Enhanced loading and response
Author(s) -
Ramanathan Kumaran,
Sundaresan N. S.,
Malhotra Bansi D.
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070614
Subject(s) - polypyrrole , glucose oxidase , conductive polymer , ferricyanide , biosensor , electrode , amperometry , chemiresistor , materials science , chemistry , cyclic voltammetry , inorganic chemistry , chemical engineering , electrochemistry , nanotechnology , engineering
Enhanced loading of glucose oxidase in polypyrrole films via manipulation of the polymer morphology is reported. The exchange of bulky anions such as p ‐toluene sulfonate and ferricyanide present as dopant ions in polypyrrole, with chloride ion in solution leads to greater porosity and resultant maximization of glucose oxidase (GOx) immobilization in polypyrrole. The polypyrrole–Gox electrode thus prepared exhibits improved performance as an amperometric glucose sensor. The fractal dimension estimated from chronoamperometric data demonstrate the increased dimensionality of the polypyrrole network after ion exchange.