کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10640062 | 995868 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
AuxAgy@ZrO2 core-shell nanoparticles: synthesis, characterization, reactivity and optical limiting
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: AuxAgy@ZrO2 core-shell nanoparticles: synthesis, characterization, reactivity and optical limiting AuxAgy@ZrO2 core-shell nanoparticles: synthesis, characterization, reactivity and optical limiting](/preview/png/10640062.png)
چکیده انگلیسی
AuxAgy@ZrO2 redispersible core-shell nanoparticles were prepared by a single step synthesis using the dimethyl formamide (DMF) reduction procedure. The material is stable for extended periods of time. The core-shell alloy nanoparticles were characterized by UV-vis spectroscopy, transmission electron microscopy, X-ray diffraction, differential scanning calorimetry and cyclic voltammetry. The as prepared particles are nanocrystalline in nature, but they give well-defined diffraction patterns upon heating to 100 °C for 8 h. The average diameter of the core is â¼35 nm and typical shell thickness is 2-3 nm. The materials show interesting reactivity with halocarbons as in the case of naked metal nanoparticles, which vary with the composition of the alloy. Our experiments show that oxide-protected alloy nanoparticles are excellent optical limiters in the nanosecond regime. Optical nonlinearity of these systems has been investigated in detail and a qualitative model has been proposed. To the best of our knowledge, this is the first report of nanoparticles having a true alloy core and an oxide shell.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 117, Issue 2, 15 March 2005, Pages 173-182
Journal: Materials Science and Engineering: B - Volume 117, Issue 2, 15 March 2005, Pages 173-182
نویسندگان
A. Sreekumaran Nair, V. Suryanarayanan, T. Pradeep, Jinto Thomas, M. Anija, Reji Philip,