Study of Diazonium Salt Film Covalently Attached at the Surface of Carbon
عنوان مقاله: Study of Diazonium Salt Film Covalently Attached at the Surface of Carbon
شناسه ملی مقاله: NAYRC02_007
منتشر شده در دومین همایش ملی نانو مواد ونانوتکنولوژی در سال 1389
شناسه ملی مقاله: NAYRC02_007
منتشر شده در دومین همایش ملی نانو مواد ونانوتکنولوژی در سال 1389
مشخصات نویسندگان مقاله:
N Yazdizade - Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
A.A Rostami - Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
A Omrani - Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
خلاصه مقاله:
N Yazdizade - Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
A.A Rostami - Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
A Omrani - Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
The electrochemically induced functionalization of glassy carbon electrode by aryl groups was achieved by reduction of in situ generated diazonium cations in aqueous media. The barrier properties of the grafted layers were evaluated by cyclic voltammetry in the presence of electroactive redox probes such as Fe(CN) 6 3-/4- and Ru(NH3) 6 3+. The modified electrodes exhibited very slow electron transfer in compare tounmodified surfaces, by factors that varied with the redox systems. However, after scanning the modified electrode in 0.1 M KCl soulution from 0.9 to -1.1 V for 10 cycles, the modified electrodes exhibited much faster electron transfer kinetics. Once the monolayer is switched ON, it supports rapid electron exchange with redox systems, but not with dopamine, which requires adsorption to the electrode surfaces. A ”switching” electrode may have the potential to impact the field of molecular electronics, which is one of the more popular areas of nanotechnology
کلمات کلیدی: cyclic voltammetry, Electrochemical Modification, Conductance Switching, surface chemistry
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/84429/