کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185591 459599 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fast vs. Slow: Electrolyte and Potential Dependent Adlayer Switching of an Oligopyridine on Au(111)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Fast vs. Slow: Electrolyte and Potential Dependent Adlayer Switching of an Oligopyridine on Au(111)
چکیده انگلیسی

The structure of an oligopyridine (3,3′-bis(terpyridine) (3,3′-BTP)) monolayer at the Au(111)|electrolyte interface shows a strong dependence on type of electrolyte and pH. Neutral phosphate buffer, sulfuric acid, sodium sulfate and perchloric acid were employed as electrolytes. Structure transitions are fast and fully reversible under acidic conditions, while an extremely slow process in the range of hours could be observed in phosphate buffer. These findings are attributed to the relative weakness of (weak) hydrogen bonds in comparison to Coulomb interactions in buffer. The slow process allows time-dependent investigations of structure formation. The systems were investigated by cyclic voltammetry (CV) and electrochemical scanning tunneling microscopy (EC-STM).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 137, 10 August 2014, Pages 416–422
نویسندگان
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