کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
182396 459424 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical formation of ultrathin Ag/Cd films onto Au(1 1 1) substrates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical formation of ultrathin Ag/Cd films onto Au(1 1 1) substrates
چکیده انگلیسی

The formation of an ultrathin bilayer of Ag/Cd in the system Au(1 1 1)/Ag+, Cd2+, SO42- has been studied by conventional electrochemical techniques and in situ scanning tunneling microscopy (STM). Cyclic voltammetric measurements carried out in a solution containing both Ag+ and Cd2+ ions have shown that the deposition of Cd onto the Au(1 1 1) modified with 3.75 ML of Ag originates adsorption/desorption UPD peaks which are similar to those obtained in the system Ag(1 1 1)/Cd2+. These results demonstrate that the Au(1 1 1) surface was completely screened by the Ag layers which were epitaxially oriented respect to the substrate. Therefore, an ultrathin Ag(1 1 1) film was formed onto the Au(1 1 1) surface, on which a Cd ML was subsequently deposited by UPD, with the final product of an ultrathin Ag–Cd bilayer on the gold substrate. The morphological surface changes during the Ag deposition and subsequent Cd UPD on the modified substrate were followed by in situ STM imaging.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 9, Issue 6, June 2007, Pages 1382–1387
نویسندگان
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