کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
195931 459827 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-assembled mixed monolayer containing ferrocenylthiol molecules: STM observations and electrochemical investigations
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Self-assembled mixed monolayer containing ferrocenylthiol molecules: STM observations and electrochemical investigations
چکیده انگلیسی

We have investigated the formation behavior and electrochemical properties of mixed self-assembled monolayers (SAMs) composed of 11-ferrocenyl-1-undecanethiol (11-FUT) and hexanethiol molecules formed using an exchange method. Two redox peaks were recognized in the cyclic voltammograms, indicating that 11-FUT molecules on gold substrates have two different states. The invariability of the peak potential observed at about 360 mV versus Ag/AgCl (3 M NaCl) evidenced that the local packing density in some parts of 11-FUT molecules is constant, irrespective of the time for the exchange process; that is, the immersion time in the 11-FUT ethanol solution. This is accounted for by the formation of the domains of 11-FUT molecules. STM images showed the formation of nano-domains when the hexanethiol molecules were replaced with 11-FUT molecules. These results suggest that the redox peak splitting observed in cyclic voltammograms is due to the difference in the local density of the 11-FUT molecules on the substrates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 52, Issue 13, 20 March 2007, Pages 4436–4442
نویسندگان
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