کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1492192 | 1510728 | 2005 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of annealing on the structural and optical properties of non-coated and silica-coated ZnS:Mn nanoparticles Effect of annealing on the structural and optical properties of non-coated and silica-coated ZnS:Mn nanoparticles](/preview/png/1492192.png)
The Mn2+-doped ZnS nanoparticles stabilized by sodium citrate were synthesized through a simple chemical route. Using the ZnS:Mn nanoparticles as seeds, the silica-coated ZnS:Mn nanocomposites were formed in isopropanol by the controlled hydrolysis of tetraethyl orthosilicate. The photoluminescence spectra confirmed that the Mn2+ ions were incorporated into the ZnS nanoparticles. The annealing effect on the structural and optical properties of these particles was studied over a range of 100–400 °C. The results of X-ray diffraction and photoluminescence showed that the silica shell not only improved the thermal stability but also resisted the lattice-deformation and oxidation of the particles. The thermal analysis further confirmed that the non-coated ZnS:Mn nanoparticles were unstable beyond 200 °C.
Journal: Materials Research Bulletin - Volume 40, Issue 12, 8 December 2005, Pages 2198–2204