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タイトル :Nano-ordered topographical effects on dissociation of carboxylic acid terminated self-assembled monolayers adsorbed onto a gold surface
著者 :Tominaga, Masato
Maetsu, Shouko
Kubo, Atsushi
Taniguchi, Isao
刊行年月日 :2007-5-15
収録雑誌名 :Journal of Electroanalytical Chemistry
巻 :603
号 :2
開始ページ :203
終了ページ :211
要約(Abstract) :A nano-ordered topographical surface (0.8-1.6 nm ) was prepared by the modification of gold nano-particles on an evaporated Au film. Nano-ordered topographical effects for the protonation-deprotonation behaviors of 10-carboxy-1-decanethiol (CDT) monolayers adsorbed onto a gold surface were then demonstrated by the use of [Ru(NH3)6]3+ as a redox probe. On the assumption that current of [Ru(NH3)6]3+ on the CDT modified electrode is composed to two independent parts of the protonated and deprotonated CDT, the titration curve for the redox peak current values obtained from cyclic voltammograms of [Ru(NH3)6]3+ as a function of pH was analyzed by a statistical mechanical model for water-solid interfaces (1-pKa model). The results obtained strongly suggest that the electrostatic repulsion of the carboxylic acid terminated self-assembled monolayer adsorbed onto a gold surface with nano-ordered topography was much smaller than that adsorbed on an atomically flat gold surface, which was also supported by reflection FTIR measurements.
収録種別 :雑誌掲載論文
出版社(者) :Elsevier
権利(Rights) :© 2007 Elsevier B.V.
URI :http://hdl.handle.net/2298/10574
関連 :http://dx.doi.org/10.1016/j.jelechem.2007.01.026
このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/2298/10574