Abstract
A layered composite film of CdS nanoparticles and a 1,6-hexanedithiol self-assembled monolayer (SAM) fabricated on a gold substrate was modified with 11-ferrocenylundecanethiol (FcC11SH), which is expected to act as an electron relay, by immersion into its hexane solution. X-ray photoelectron spectroscopy and electrochemical measurements revealed that FcC11S(H) is mainly located on the gold surface, and partly on the CdS nanoparticle layer. The FcC11SH modification induced a significant difference in the photoelectrochemical characteristics of the composite film. The photocurrent increased and decreased at potentials more positive and negative than the redox potential of the ferrocene moiety, respectively, leading to a positive shift in the onset potential for the photoinduced anodic current. A change in the transient photoresponse was also observed. Efficient electron transfer by the ferrocene moiety immobilized between the gold substrate and the CdS nanoparticle layer accounts reasonably for the behavior mentioned above.
| Original language | English |
|---|---|
| Pages (from-to) | 229-234 |
| Number of pages | 6 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 455 |
| Issue number | 1-2 |
| Publication status | Published - 1998 Sep 15 |
| Externally published | Yes |
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Keywords
- 11-Ferrocenylundecanethiol
- CdS nanoparticle
- Photoelectrochemistry
- Self-assembled monolayer
- XPS
ASJC Scopus subject areas
- Chemical Engineering(all)
- Analytical Chemistry
- Electrochemistry
Cite this
Effect of immobilized electron relay on the interfacial photoinduced electron transfer at a layered inorganic-organic composite film on gold. / Nakanishi, Takuya; Ohtani, Bunsho; Uosaki, Kohei.
In: Journal of Electroanalytical Chemistry, Vol. 455, No. 1-2, 15.09.1998, p. 229-234.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of immobilized electron relay on the interfacial photoinduced electron transfer at a layered inorganic-organic composite film on gold
AU - Nakanishi, Takuya
AU - Ohtani, Bunsho
AU - Uosaki, Kohei
PY - 1998/9/15
Y1 - 1998/9/15
N2 - A layered composite film of CdS nanoparticles and a 1,6-hexanedithiol self-assembled monolayer (SAM) fabricated on a gold substrate was modified with 11-ferrocenylundecanethiol (FcC11SH), which is expected to act as an electron relay, by immersion into its hexane solution. X-ray photoelectron spectroscopy and electrochemical measurements revealed that FcC11S(H) is mainly located on the gold surface, and partly on the CdS nanoparticle layer. The FcC11SH modification induced a significant difference in the photoelectrochemical characteristics of the composite film. The photocurrent increased and decreased at potentials more positive and negative than the redox potential of the ferrocene moiety, respectively, leading to a positive shift in the onset potential for the photoinduced anodic current. A change in the transient photoresponse was also observed. Efficient electron transfer by the ferrocene moiety immobilized between the gold substrate and the CdS nanoparticle layer accounts reasonably for the behavior mentioned above.
AB - A layered composite film of CdS nanoparticles and a 1,6-hexanedithiol self-assembled monolayer (SAM) fabricated on a gold substrate was modified with 11-ferrocenylundecanethiol (FcC11SH), which is expected to act as an electron relay, by immersion into its hexane solution. X-ray photoelectron spectroscopy and electrochemical measurements revealed that FcC11S(H) is mainly located on the gold surface, and partly on the CdS nanoparticle layer. The FcC11SH modification induced a significant difference in the photoelectrochemical characteristics of the composite film. The photocurrent increased and decreased at potentials more positive and negative than the redox potential of the ferrocene moiety, respectively, leading to a positive shift in the onset potential for the photoinduced anodic current. A change in the transient photoresponse was also observed. Efficient electron transfer by the ferrocene moiety immobilized between the gold substrate and the CdS nanoparticle layer accounts reasonably for the behavior mentioned above.
KW - 11-Ferrocenylundecanethiol
KW - CdS nanoparticle
KW - Photoelectrochemistry
KW - Self-assembled monolayer
KW - XPS
UR - http://www.scopus.com/inward/record.url?scp=0032155653&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032155653&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0032155653
VL - 455
SP - 229
EP - 234
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0022-0728
IS - 1-2
ER -