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Potentiometric cholesterol biosensor based on ZnO nanorods chemically grown on Ag wire

Israr, M. Q.; Sadaf, J. R.; Asif, M. H.; Nur, O.; Willander, M. and Danielsson, Bengt LU (2010) India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environmental Preservation (IJWBME2009) In Thin Solid Films 519(3). p.1106-1109
Abstract
An electrochemical biosensor based on ZnO nanorods for potentiometric cholesterol determination is proposed. Hexagon-shaped ZnO nanorods were directly grown on a silver wire having a diameter of 250 mu m using low temperature aqueous chemical approach that produced ZnO nanorods with a diameter of 125250 nm and a length of similar to 1 mu m. Cholesterol oxidase (ChOx) was immobilized by a physical adsorption method onto ZnO nanorods. The electrochemical response of the ChOx/ZnO/Ag biosensor against a standard reference electrode (Ag/AgCl) was investigated as a logarithmic function of the cholesterol concentration (1 x 10(-6)M to 1 x 10(-2)M) showing good linearity with a sensitivity of 35.2 mV per decade and the stable output signal was... (More)
An electrochemical biosensor based on ZnO nanorods for potentiometric cholesterol determination is proposed. Hexagon-shaped ZnO nanorods were directly grown on a silver wire having a diameter of 250 mu m using low temperature aqueous chemical approach that produced ZnO nanorods with a diameter of 125250 nm and a length of similar to 1 mu m. Cholesterol oxidase (ChOx) was immobilized by a physical adsorption method onto ZnO nanorods. The electrochemical response of the ChOx/ZnO/Ag biosensor against a standard reference electrode (Ag/AgCl) was investigated as a logarithmic function of the cholesterol concentration (1 x 10(-6)M to 1 x 10(-2)M) showing good linearity with a sensitivity of 35.2 mV per decade and the stable output signal was attained at around 10 s. (C) 2010 Elsevier BM. All rights reserved. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
ZnO nanorods, Electrostatic immobilization, Cholesterol oxidase, Potentiometric biosensor, Cholesterol
in
Thin Solid Films
volume
519
issue
3
pages
1106 - 1109
publisher
Elsevier
conference name
India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environmental Preservation (IJWBME2009)
external identifiers
  • wos:000285075300032
  • scopus:78049300950
ISSN
0040-6090
DOI
10.1016/j.tsf.2010.08.052
language
English
LU publication?
yes
id
2ab3b793-50e6-41c1-8d4a-49c7157eeb0f (old id 1772900)
date added to LUP
2011-02-02 21:00:08
date last changed
2018-05-29 10:52:55
@inproceedings{2ab3b793-50e6-41c1-8d4a-49c7157eeb0f,
  abstract     = {An electrochemical biosensor based on ZnO nanorods for potentiometric cholesterol determination is proposed. Hexagon-shaped ZnO nanorods were directly grown on a silver wire having a diameter of 250 mu m using low temperature aqueous chemical approach that produced ZnO nanorods with a diameter of 125250 nm and a length of similar to 1 mu m. Cholesterol oxidase (ChOx) was immobilized by a physical adsorption method onto ZnO nanorods. The electrochemical response of the ChOx/ZnO/Ag biosensor against a standard reference electrode (Ag/AgCl) was investigated as a logarithmic function of the cholesterol concentration (1 x 10(-6)M to 1 x 10(-2)M) showing good linearity with a sensitivity of 35.2 mV per decade and the stable output signal was attained at around 10 s. (C) 2010 Elsevier BM. All rights reserved.},
  author       = {Israr, M. Q. and Sadaf, J. R. and Asif, M. H. and Nur, O. and Willander, M. and Danielsson, Bengt},
  booktitle    = {Thin Solid Films},
  issn         = {0040-6090},
  keyword      = {ZnO nanorods,Electrostatic immobilization,Cholesterol oxidase,Potentiometric biosensor,Cholesterol},
  language     = {eng},
  number       = {3},
  pages        = {1106--1109},
  publisher    = {Elsevier},
  title        = {Potentiometric cholesterol biosensor based on ZnO nanorods chemically grown on Ag wire},
  url          = {http://dx.doi.org/10.1016/j.tsf.2010.08.052},
  volume       = {519},
  year         = {2010},
}