کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
221058 463368 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemically and catalytically active layer-by-layer films of myoglobin with zirconia formed by vapor-surface sol–gel deposition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemically and catalytically active layer-by-layer films of myoglobin with zirconia formed by vapor-surface sol–gel deposition
چکیده انگلیسی

A myoglobin (Mb) film was successfully assembled layer-by-layer with zirconia formed by vapor-surface sol–gel deposition on solid surfaces. The method involved vaporization of zirconium butoxide (Zr(OBu)4) into thin layers of water, forming ZrO2 sol–gel layers after hydrolysis of Zr(OBu)4. Mb was assembled by adsorption alternated with the ZrO2 layers. The {ZrO2/Mb}n layer-by-layer films at pyrolytic graphite electrodes demonstrated a pair of well-defined and nearly reversible CV peaks at about −0.34 V vs SCE, characteristic of Mb Fe(III)/Fe(II) redox couple, and used to catalyze reduction of oxygen and hydrogen peroxide. FTIR spectroscopy and comparison studies with {ZrO2/catalase}n films suggest that Mb in the zirconia sol–gel films essentially retains its native structure. Compared with Mb layer-by-layer films assembled with ZrO2 nanoparticles, {ZrO2/Mb}n films showed larger numbers of electroactive bilayers and higher maximum surface concentration of electroactive Mb, which may be related to the unique structure of ZrO2 sol–gel with higher porosity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 599, Issue 1, 1 January 2007, Pages 91–99
نویسندگان
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