Abstract
The electrochemical properties of a gold electrode modified with a mixed thiol monolayer containing both a polar and a non-polar head group have been investigated in aqueous Fe(CN)64-, flavin adenine dinucleotide (FAD) and ubiquinone-0 (2,3-dimethoxy-5-methyl-1,4-benzoquinone, UQ0) solutions. The cyclic voltammetric current-potential (i-E) response of Fe(CN)64- was found to be affected considerably by the polarity of the head group contained in the mixed monolayer assembly, as compared with those of FAD and UQ0. It was also found that in the cases of UQ0 and FAD the i-E responses for the modified electrode were affected by their own molecular size rather than the polarity of the mixed monolayer head group. Furthermore, compared with Fe(CN)64- ion, these biologically related molecules are able to permeate readily into the well-organized and hydrophobic alkyl chains of the monolayer assembly. The voltammetric profile of UQ0 was improved by the modification of aminoethanethiol, as compared with those of bare gold and the electrode modified with other polar thiols. Further, two different permeation paths of the electrode species into the mixed monolayer are suggested from the variation of the i-E response with the cycle of the potential scan.
| Original language | English |
|---|---|
| Pages (from-to) | 207-219 |
| Number of pages | 13 |
| Journal | Bioelectrochemistry and Bioenergetics |
| Volume | 27 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 1992 |
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All Science Journal Classification (ASJC) codes
- Biophysics
- Physical and Theoretical Chemistry
- Electrochemistry
Cite this
Electrochemical properties of a gold electrode modified with a mixed monolayer. / Takehara, Ko; Ide, Yasushi.
In: Bioelectrochemistry and Bioenergetics, Vol. 27, No. 2, 04.1992, p. 207-219.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical properties of a gold electrode modified with a mixed monolayer
AU - Takehara, Ko
AU - Ide, Yasushi
PY - 1992/4
Y1 - 1992/4
N2 - The electrochemical properties of a gold electrode modified with a mixed thiol monolayer containing both a polar and a non-polar head group have been investigated in aqueous Fe(CN)64-, flavin adenine dinucleotide (FAD) and ubiquinone-0 (2,3-dimethoxy-5-methyl-1,4-benzoquinone, UQ0) solutions. The cyclic voltammetric current-potential (i-E) response of Fe(CN)64- was found to be affected considerably by the polarity of the head group contained in the mixed monolayer assembly, as compared with those of FAD and UQ0. It was also found that in the cases of UQ0 and FAD the i-E responses for the modified electrode were affected by their own molecular size rather than the polarity of the mixed monolayer head group. Furthermore, compared with Fe(CN)64- ion, these biologically related molecules are able to permeate readily into the well-organized and hydrophobic alkyl chains of the monolayer assembly. The voltammetric profile of UQ0 was improved by the modification of aminoethanethiol, as compared with those of bare gold and the electrode modified with other polar thiols. Further, two different permeation paths of the electrode species into the mixed monolayer are suggested from the variation of the i-E response with the cycle of the potential scan.
AB - The electrochemical properties of a gold electrode modified with a mixed thiol monolayer containing both a polar and a non-polar head group have been investigated in aqueous Fe(CN)64-, flavin adenine dinucleotide (FAD) and ubiquinone-0 (2,3-dimethoxy-5-methyl-1,4-benzoquinone, UQ0) solutions. The cyclic voltammetric current-potential (i-E) response of Fe(CN)64- was found to be affected considerably by the polarity of the head group contained in the mixed monolayer assembly, as compared with those of FAD and UQ0. It was also found that in the cases of UQ0 and FAD the i-E responses for the modified electrode were affected by their own molecular size rather than the polarity of the mixed monolayer head group. Furthermore, compared with Fe(CN)64- ion, these biologically related molecules are able to permeate readily into the well-organized and hydrophobic alkyl chains of the monolayer assembly. The voltammetric profile of UQ0 was improved by the modification of aminoethanethiol, as compared with those of bare gold and the electrode modified with other polar thiols. Further, two different permeation paths of the electrode species into the mixed monolayer are suggested from the variation of the i-E response with the cycle of the potential scan.
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UR - http://www.scopus.com/inward/citedby.url?scp=0026511015&partnerID=8YFLogxK
U2 - 10.1016/0302-4598(92)87044-U
DO - 10.1016/0302-4598(92)87044-U
M3 - Article
AN - SCOPUS:0026511015
VL - 27
SP - 207
EP - 219
JO - Bioelectrochemistry
JF - Bioelectrochemistry
SN - 1567-5394
IS - 2
ER -