
Influence of reaction time on optical property of ZnS:Mn nanoparticles synthesized by a hydrothermal method / Bui, Hong Van
Tác giả : Bui, Hong Van
Nhà xuất bản : H. : ĐHQGHN
Năm xuất bản : 2017
Tùng thư :
Journal of Mathematics- Physics
Chủ đề : 1. Nanoparticles. 2. photoluminescence. 3. photoluminescence excitation. 4. Article.
Thông tin chi tiết
Tóm tắt : | ZnS:Mn (CMn = 5 %mol) nanoparticles have been synthesized by a hydrothermal method from solutions of Zn(CH3COO)2 0.1 M, Na2S2O3 0.1 M and Mn(CH3COO)2 0.01 M at 220oC for different reaction time. The result showed that increasing reaction time from 3 to 30h almost does not change cubic crystalline structure, peak positions attributed to Mn2+ ions at 585 nm in photoluminescence spectra and 392, 430, 463, 468, 492 nm in photoluminescence excitation spectra when monitoring the 585 nm band of ZnS:Mn nanoparticles but only slight increases lattice constant, the average particle size and changing their intensity. As increasing the reaction time from 3 to 10h, intensity of bands attributed to Mn2+ ions also increase, reaches the maximum at 15h and then decreases as increasing reaction time to 30 h. Cause of these phenomena have been investigated and reported. |
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https://repository.vnu.edu.vn/handle/VNU_123/55390 |