کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7698656 1496566 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Defect diffusion assisted formation of cesium metal clusters in cesium halide thin films
ترجمه فارسی عنوان
انتشار ناقص کمک به تشکیل خوشه های فلزی سزیم در فیلم های نازک سدیم هالید
کلمات کلیدی
نانوساختارها، اینترفیس ها، فیلم های نازک مراکز رنگ، نفوذ،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی
This manuscript describes the evolution of grain structures in cesium halide films which leads to localized surface plasmon resonance (LSPR) peaks in UV-visible absorption spectra. Thin films of cesium halide age with time as grain boundaries recede making grains spherical in shape in order to minimize the free surface energy of the system. The process is also assisted by the presence of point defects/color centers in cesium halide films. The defects migrate outwards towards the grain surface, giving cesium metal clusters at the surface, resulting in core-shell structure. Along with volume diffusion, a surface diffusion of cesium takes place towards sites of facet grains boundaries resulting in a necking phenomenon, appearing like bridges between the daughter cesium halide grains (grains appearing due to the division of a single grain). Breaking away of the daughter cesium halide grains results in nano-rods that contribute to the SPR peak seen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Taibah University for Science - Volume 11, Issue 6, November 2017, Pages 1238-1244
نویسندگان
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