کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
188532 459661 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemistry of methylene blue at an alkanethiol modified electrode
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemistry of methylene blue at an alkanethiol modified electrode
چکیده انگلیسی

Gold surfaces were derivatized with decanethiol. The electrochemistry of methylene blue at these modified electrodes was investigated in function of the gold cleaning process and compared with the results obtained at a bare gold electrode. Cyclic voltammetry at low methylene blue concentrations (cMB ≤ 16 μM) yielded surface behavior data. The properties of the film vary with the electrode pretreatment. Without electrochemical cleaning step, the standard potential at a gold electrode modified with 1-decanethiol is nearly the same as on a bare gold electrode. On the other hand, when the electrode is electrochemically cleaned before adsorption of the alkanethiols, the standard potential of MB appears at a more positive value than on gold electrode. The electrochemical pretreatment promotes the penetration of both oxidized and reduced forms of MB into the monolayer. The insertion of methylene blue into the monolayer was fitted using a Langmuir isotherm adsorption. This supports a model where the methylene blue molecules partitioned into hydrophobic pockets of the film.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 75, 30 July 2012, Pages 387–392
نویسندگان
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