Published in
Springer Verlag, Theoretical and Experimental Chemistry, 6(51), p. 358-365
DOI: 10.1007/s11237-016-9436-z
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Effect of Post-Synthesis Heat Treatment of ZnO Nanoparticles in DMF on Their Size and Spectral and Luminescent Properties
,
S. Y.-A. Kuchmy,
A. G. Milekhin,
L. L. Sveshnikova,
T. A. Duda,
N. A. Yeryukov,
E. E. Rodyakina
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Abstract
A method is proposed for the formation of ZnO nanoparticles (NP) in dimethylformamide, which permits variation of the mean NP diameter from 3.6-3.7 to 6.0 nm by selecting the suitable duration and temperature of the post-synthesis heat treatment. The ZnO nanoparticles in DMF display characteristic photoluminescence, emitting in a broad band with maximum at 2.24-2.25 eV, with a quantum yield up to 13%, and a mean radiative lifetime of ~2 μs. Giant enhancement of Raman scattering on the surface phonons of the ZnO NP is observed upon the photoexcitation of these NP with an island-like silver film deposited on their surface.