Preparation and optical properties of polyethyleneimine-stabilized colloidal CdSe and Cd[S.sub.x][Se.sub.1-x] quantum dots

Using unbranched polyethyleneimine as a stabilizer, we have obtained colloidal aqueous solutions of ultrasmall (1.8-1.9 nm) CdSe particles, characterized by a narrow size distribution and photoluminescence in the visible region of the spectrum with quantum yields up to 12% and decay constants in the...

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Bibliographic Details
Published in:Theoretical and experimental chemistry 2011-01, Vol.46 (6), p.416
Main Authors: Raevskaya, A.E, Grodzyuk, G. Ya, Korzhak, A.V, Stroyuk, A.L, Kuchmii, S. Ya, Dzhagan, V.N, Valakh, M. Ya, Plyusnin, V.F, Grivin, V.P, Mel'nik, N.N, Zavaritskaya, T.N, Kucherenko, T.N, Plyashechnik, O.S
Format: Article
Language:English
Subjects:
Analysis
Optical properties
Photoluminescence
Toy industry
Online Access:Get full text
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Summary:Using unbranched polyethyleneimine as a stabilizer, we have obtained colloidal aqueous solutions of ultrasmall (1.8-1.9 nm) CdSe particles, characterized by a narrow size distribution and photoluminescence in the visible region of the spectrum with quantum yields up to 12% and decay constants in the range 10T1 to 102 ns. A similar approach was used to obtain colloids of nanoparticles of a Cd[S.sub.x][Se.sub.1-x] solid solution with a tailored composition. Key words: ultrasmall nanoparticles, cadmium selenide, cadmium sulfoselenide, solid solutions, polyethyleneimine, photoluminescence.
ISSN:0040-5760