کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5362986 | 1388295 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical properties of sol-gel fabricated Mn/SiO2 nanocomposites: Observation of surface plasmon resonance in Mn nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Manganese nanoparticles were grown in silica glass and silica film on silicon substrate by annealing of the sol-gel prepared porous silicate matrices doped with manganese nitrate. Annealing of doped porous silicate matrices was performed at various conditions that allowed to obtain the nanocomposite glasses with various content of metallic Mn. TEM of Mn/SiO2 glass indicates the bimodal size distribution of Mn nanoparticles with mean sizes of 10.5Â nm and 21Â nm. The absorption and photoluminescence spectra of Mn/SiO2 glasses were measured. In the absorption spectra at 300Â nm (4.13Â eV) we observed the band attributed to the surface plasmon resonance in Mn nanoparticles. The spectra proved the creation of Mn2+ and Mn3+ ions in silica glass as well. The absorption spectra of Mn/SiO2 glasses annealed in air prove the creation of manganese oxide Mn2O3. The measured reflection spectra of Mn/SiO2 film manifest at 240-310Â nm the peculiarity attributed to surface plasmons in Mn nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 254, Issue 9, 28 February 2008, Pages 2736-2742
Journal: Applied Surface Science - Volume 254, Issue 9, 28 February 2008, Pages 2736-2742
نویسندگان
Oleg A. Yeshchenko, Igor M. Dmitruk, Alexandr A. Alexeenko, Andriy M. Dmytruk,