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Chitosan‐Cross‐linked Osmium Polymer Composites as an Efficient Platform for Electrochemical Biosensors
Author(s) -
Jirimali Harishchandra Digambar,
Nagarale Rajaram Krishna,
Lee Jong Myung,
Saravanakumar Durai,
Shin Woonsup
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201300169
Subject(s) - osmium , chitosan , biosensor , polymer , electrochemistry , materials science , nanotechnology , conductive polymer , polymer science , polymer chemistry , composite material , chemical engineering , chemistry , electrode , organic chemistry , ruthenium , engineering , catalysis
A new family of chitosan‐cross‐linked osmium polymer composites was prepared and its electrochemical properties were examined. The composites were prepared by quaternization of the poly(4‐vinylpyridine) osmium bipyridyl polymer (PVP‐Os) which was then cross‐linked with chitosan, yielding PVP‐Os/chitosan. Films made of the composites showed improved mass and electron transport owing to the porous and hydrophilic structure which is derived from the cross‐links between the Os polymer and chitosan. The rate for glucose oxidation was enhanced four times when glucose oxidase (GOx) was immobilized on PVP‐Os/chitosan compared immobilization on PVP‐Os.