The Study of Self-Assembly Nano Modified Gold Electrodes for Applications in the Protein Biochips Electrochemical Biosensor
Date Issued
2003-02-20
Date
2003-02-20
Author(s)
DOI
912622E002009CC3
Abstract
In the thesis, alkyl thiols are used to
form oriented self-assembly monolayers.
Oriented monolayers offer the possibility of
precise control of spacing and orientation on
a molecular level. It was reported that
self-assembly monolayers formed from alkyl
thiols are remarkably stable in aqueous
solution [1]. This research is mainly carried
out by electrochemical analysis techniques,
The rotating disk system was applied to study the electrochemical reaction mechanisms.
Three different alkyl thiols R-SH
（R=CnH2n+1 ，n=4 、8 、12 ）were used in this
study. As the alkyl chain length of thiols on
gold electrode increases, the conductivity of
gold electrode will decrease, the redox
reaxtion will derivate from reversible
reaction more and more obviously. The
inhibition of thiol modified gold electrode to
the diffusivities of Fe(CN)6 3-/4- and
Co(bpy)3 3+/2+ couples are also discussed in
the study. As the alkyl chain length of thiols
on gold electrode increases, the reaction rate
constants decrease at the same time.
Especially for the dodecanethiol modified
gold electrode, the thickness of self-assembly
monolayer is larger, and molecule will
arrange much closer. As a result, the redox
couples are almost kept out of the gold
surface.
Subjects
electrochemical method
protein
sensor
sensor
self-assembly monolayer
modified
gold electrode
gold electrode
Publisher
臺北市：國立臺灣大學化學工程學系暨研究所
Type
report
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