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Synthesis and Photophysical Properties of ZnS Colloidal Particles Doped with Silver

✍ Scribed by Encai Hao; Yipeng Sun; Bai Yang; Xi Zhang; Jiming Liu; Jiacong Shen

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
89 KB
Volume
204
Category
Article
ISSN
0021-9797

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✦ Synopsis

The synthesis and photophysical characterization of ZnS:Ag colloid are reported. The presence of mercaptoacetic acid has an important effect not only on the formation of doped and undoped ZnS but also on the photophysical properties. ZnS colloid doped with silver shows a strong green emission upon ultraviolet excitation, the intensity of which was enhanced significantly compared with that of the undoped colloid. The green emission was ascribed to a transition from a donor level such as anion vacancy to the levels of the Ag impurities.

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## Abstract Nanocrystalline samples of Zn~1‐x~Mn~x~S (x = 0.0, 0.02, 0.04) were synthesized by chemical precipitation method and characterized for magnetism. EPR studies showed an evidence of ferromagnetism around room temperature. Hysterisis from vibrating sample magnetometer supports the observat