کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1482348 991563 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lead sulfide quantum dots in glasses controlled by silver diffusion
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Lead sulfide quantum dots in glasses controlled by silver diffusion
چکیده انگلیسی

Precipitation of PbS quantum dots (QDs) in silicate glasses controlled by Ag+ ion diffusion was investigated. Ag+ ions penetrated ~ 0.5 μm into the glass when the glass was immersed in the AgNO3 solution at 80 °C. Ag nano-particles (NPs) and PbS QDs were formed after heat-treatment at temperatures of 420–460 °C for 10 h. PbS QDs in Ag+-diffused regions photoluminesced at longer wavelengths than did those in Ag+-free regions. This indicates that PbS QDs thus formed in regions containing Ag NPs were larger than those in Ag+-free regions and this size difference was confirmed from the transmission electron microscope images. PbS QDs can grow at temperature as low as 420 °C in Ag+-diffused regions and this implies that PbS QDs form preferentially using Ag NPs as nucleating agents.


► Precipitation of PbS quantum dots in glasses was controlled by Ag+ ion diffusion.
► PbS quantum dots formed in Ag+-diffused regions were larger than those in Ag+-free regions.
► PbS quantum dots can preferentially precipitate in Ag+-diffused regions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 358, Issue 5, 1 March 2012, Pages 921–924
نویسندگان
, ,