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Screen-printed carbon electrodes modified with cellobiose dehydrogenase: Amplification factor for catechol vs. reversibility of ferricyanide

Dock, Eva LU and Ruzgas, Tautgirdas LU (2003) In Electroanalysis 15(5-6). p.492-498
Abstract
A number of screen-printed carbon electrodes (SPCEs) have been electrochemically studied revealing strong correlation between the reversibility of the Fe(CN)/Fe(CN) couple and the sensitivity for catechol at the same electrodes modified with cellobiose dehydrogenase (CDH). Pretreatment of the electrode surfaces increased both the heterogeneous ferricyanide reaction rate and the catechol sensitivity. From cyclic voltammetric and chronoamperometric measurements of Fe(CN) it was concluded that the tested SPCEs behave as microelectrode arrays. Using the pinhole model the fraction of electroactive area was determined to directly correlate to a faster heterogeneous electron transfer for ferricyanide and a higher CDH-modified biosensor... (More)
A number of screen-printed carbon electrodes (SPCEs) have been electrochemically studied revealing strong correlation between the reversibility of the Fe(CN)/Fe(CN) couple and the sensitivity for catechol at the same electrodes modified with cellobiose dehydrogenase (CDH). Pretreatment of the electrode surfaces increased both the heterogeneous ferricyanide reaction rate and the catechol sensitivity. From cyclic voltammetric and chronoamperometric measurements of Fe(CN) it was concluded that the tested SPCEs behave as microelectrode arrays. Using the pinhole model the fraction of electroactive area was determined to directly correlate to a faster heterogeneous electron transfer for ferricyanide and a higher CDH-modified biosensor sensitivity for catechol. An electroactive area of 50% and higher is sufficient to create a sufficiently good biosensor for catechol. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Electroanalysis
volume
15
issue
5-6
pages
492 - 498
publisher
John Wiley & Sons
external identifiers
  • wos:000182694800021
  • scopus:0038674298
ISSN
1040-0397
DOI
language
English
LU publication?
yes
id
e7d0936a-9356-41cd-93d3-c5823d196430 (old id 128890)
date added to LUP
2007-06-26 14:34:48
date last changed
2018-05-29 12:29:27
@article{e7d0936a-9356-41cd-93d3-c5823d196430,
  abstract     = {A number of screen-printed carbon electrodes (SPCEs) have been electrochemically studied revealing strong correlation between the reversibility of the Fe(CN)/Fe(CN) couple and the sensitivity for catechol at the same electrodes modified with cellobiose dehydrogenase (CDH). Pretreatment of the electrode surfaces increased both the heterogeneous ferricyanide reaction rate and the catechol sensitivity. From cyclic voltammetric and chronoamperometric measurements of Fe(CN) it was concluded that the tested SPCEs behave as microelectrode arrays. Using the pinhole model the fraction of electroactive area was determined to directly correlate to a faster heterogeneous electron transfer for ferricyanide and a higher CDH-modified biosensor sensitivity for catechol. An electroactive area of 50% and higher is sufficient to create a sufficiently good biosensor for catechol.},
  author       = {Dock, Eva and Ruzgas, Tautgirdas},
  issn         = {1040-0397},
  language     = {eng},
  number       = {5-6},
  pages        = {492--498},
  publisher    = {John Wiley & Sons},
  series       = {Electroanalysis},
  title        = {Screen-printed carbon electrodes modified with cellobiose dehydrogenase: Amplification factor for catechol vs. reversibility of ferricyanide},
  url          = {http://dx.doi.org/},
  volume       = {15},
  year         = {2003},
}