The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface
The impact of the coverage of ferrocene moieties, attached to a silicon electrode modified via hydrosilylation of a dialkyne, on the kinetics of electron transfer between the redox species and the electrode is explored. The coverage of ferrocene is controlled by varying the coupling time between azi...
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Elsevier
2015
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| অনলাইন ব্যবহার করুন: | http://psasir.upm.edu.my/id/eprint/46616/1/The%20impact%20of%20surface%20coverage%20on%20the%20kinetics%20of%20electron%20transfer%20through%20redox%20monolayers%20on%20a%20silicon%20electrode%20surface.pdf |
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oai:psasir.upm.edu.my:46616 http://psasir.upm.edu.my/id/eprint/46616/ The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface Ciampi, Simone Choudhury, Moinul H. Alang Ahmad, Shahrul Ainliah Darwish, Nadim Brun, Anton Le Gooding, J. Justin The impact of the coverage of ferrocene moieties, attached to a silicon electrode modified via hydrosilylation of a dialkyne, on the kinetics of electron transfer between the redox species and the electrode is explored. The coverage of ferrocene is controlled by varying the coupling time between azidomethylferrocene and the distal alkyne of the monolayer via the copper assisted azide-alkyne cycloaddition reaction. All other variables in the surface preparation are maintained identical. What is observed is that the higher the surface coverage of the ferrocene moieties the faster the apparent rates of electron transfer. This surface coverage-dependent kinetic effect is attributed to electrons hopping between ferrocene moieties across the redox film toward hotspots for the electron transfer event. The origin of these hotspots is tentatively suggested to result from minor amounts of oxide on the underlying silicon surface that reduce the barrier for the electron transfer. Elsevier 2015-12 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/46616/1/The%20impact%20of%20surface%20coverage%20on%20the%20kinetics%20of%20electron%20transfer%20through%20redox%20monolayers%20on%20a%20silicon%20electrode%20surface.pdf Ciampi, Simone and Choudhury, Moinul H. and Alang Ahmad, Shahrul Ainliah and Darwish, Nadim and Brun, Anton Le and Gooding, J. Justin (2015) The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface. Electrochimica Acta, 186 (12). pp. 216-222. ISSN 0013-4686; ESSN: 1873-3859 http://www.elsevier.com/locate/issn/00134686 10.1016/j.electacta.2015.10.125 |
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UPM IR |
| collection |
UPM IR |
| language |
English |
| description |
The impact of the coverage of ferrocene moieties, attached to a silicon electrode modified via hydrosilylation of a dialkyne, on the kinetics of electron transfer between the redox species and the electrode is explored. The coverage of ferrocene is controlled by varying the coupling time between azidomethylferrocene and the distal alkyne of the monolayer via the copper assisted azide-alkyne cycloaddition reaction. All other variables in the surface preparation are maintained identical. What is observed is that the higher the surface coverage of the ferrocene moieties the faster the apparent rates of electron transfer. This surface coverage-dependent kinetic effect is attributed to electrons hopping between ferrocene moieties across the redox film toward hotspots for the electron transfer event. The origin of these hotspots is tentatively suggested to result from minor amounts of oxide on the underlying silicon surface that reduce the barrier for the electron transfer. |
| format |
Article |
| author |
Ciampi, Simone Choudhury, Moinul H. Alang Ahmad, Shahrul Ainliah Darwish, Nadim Brun, Anton Le Gooding, J. Justin |
| spellingShingle |
Ciampi, Simone Choudhury, Moinul H. Alang Ahmad, Shahrul Ainliah Darwish, Nadim Brun, Anton Le Gooding, J. Justin The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| author_facet |
Ciampi, Simone Choudhury, Moinul H. Alang Ahmad, Shahrul Ainliah Darwish, Nadim Brun, Anton Le Gooding, J. Justin |
| author_sort |
Ciampi, Simone |
| title |
The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| title_short |
The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| title_full |
The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| title_fullStr |
The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| title_full_unstemmed |
The impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| title_sort |
impact of surface coverage on the kinetics of electron transfer through redox monolayers on a silicon electrode surface |
| publisher |
Elsevier |
| publishDate |
2015 |
| url |
http://psasir.upm.edu.my/id/eprint/46616/1/The%20impact%20of%20surface%20coverage%20on%20the%20kinetics%20of%20electron%20transfer%20through%20redox%20monolayers%20on%20a%20silicon%20electrode%20surface.pdf |
| _version_ |
1819296737736523776 |
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13.4562235 |