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Electron and ion transport through multilayers of Au nanoclusters covered by self-assembled monolayers

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Title: Electron and ion transport through multilayers of Au nanoclusters covered by self-assembled monolayers
Authors: Song, Wenbo Browse this author
Okamura, Masayuki Browse this author
Kondo, Toshihiro Browse this author
Uosaki, Kohei Browse this author
Keywords: Au nanoclusters
Self-assembled monolayers
Electron transport
Ion transport
Issue Date: 15-Sep-2003
Publisher: Elsevier
Journal Title: Journal of Electroanalytical Chemistry
Volume: 554-555
Start Page: 385
End Page: 393
Publisher DOI: 10.1016/S0022-0728(03)00303-6
Abstract: Two types of gold nanoclusters (GNCs), one covered by self-assembled monolayers of mercaptoundecanoic acid (MUA), hexanethiol (C6SH), and ferrocenylhexanethiol (FcC6SH), MHF-GNC, and the other with MUA and C6SH, MH-GNC, were used for the construction of ten GNC layers of two different sequences on an MUA modified Au(1 1 1) surface based on the carboxylate/polycation (poly(allylamine hydrochloride), PAH)/carboxylate electrostatic interaction. MHF-GNC was placed either as the layer closest to the gold electrode, i.e. the first layer, or as the outermost layer with MH-GHC in the other layers. A quasi-reversible redox peak with a constant charge corresponding to the redox reaction of the ferrocene moiety of the MHF-GNC monolayer was observed at both electrodes, showing electrons and perchlorate ions could be transferred through the MH-GNC/PAH multilayers. Cross-sectional transmission electron microscopy (TEM) revealed that the size of the immobilized GNC was almost same as that in solution and well-separated GNCs were dispersed rather uniformly within the polymeric matrix. The incorporation of perchlorate ion upon the oxidation of the ferrocene moiety of the MHF-GNC was demonstrated by electrochemical quartz crystal microbalance measurement. Based on the above results, the charge transfer mechanism in the GNC multilayers was discussed.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 魚崎 浩平

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