کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
608237 1454606 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bio-inspired catechol chemistry for electrophoretic nanotechnology of oxide films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Bio-inspired catechol chemistry for electrophoretic nanotechnology of oxide films
چکیده انگلیسی

Bio-inspired chemical approach has been developed for the surface modification and electrophoretic deposition of manganese dioxide and zirconia nanoparticles, prepared by chemical precipitation methods. Caffeic acid, trans-cinnamic acid, p-coumaric acid, and 2,4-dihydroxycinnamic acid were investigated for the surface modification of the nanoparticles. The influence of the structure of the organic molecules on their adsorption on the oxide nanoparticles has been investigated. The mechanism of caffeic acid adsorption was similar to that of natural catecholic amino acid, l-3,4-dihydroxyphenylalanine. The use of caffeic acid allowed for agglomerate-free synthesis, efficient dispersion, charging, electrophoretic deposition and co-deposition of manganese dioxide and zirconia nanoparticles. The deposition yield data, coupled with the results of thermogravimetric analysis, X-ray diffraction analysis, and Fourier transform infrared spectroscopy, showed that surface chemistry, rather than the crystal structure, determined the adsorption behavior. Electron microscopy and energy dispersive spectroscopy investigations showed the formation of nanostructured oxide films and composites. The deposit composition can be varied.

Figure optionsDownload high-quality image (68 K)Download as PowerPoint slideHighlights
► Bio-inspired approach has been developed for surface modification of nanoparticles.
► The method allowed dispersion of nanoparticles and electrophoretic deposition.
► Manganese dioxide and zirconia nanoparticles were deposited using caffeic acid.
► Surface chemistry of nanoparticles determined the adsorption behavior.
► The method allowed agglomerate-free processing and deposition of composites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 380, Issue 1, 15 August 2012, Pages 8–15
نویسندگان
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