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Synthesis and Characterization of Water―soluble CdHgTe Alloyed Quantum Dots

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Author(s): WANG Yi-Lin, TONG Zhang-Fa, LU Jian-Ping, LI Jian-Hui, ZHOU Li-Ya

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 26;
Issue: 7;
Start page: 735;
Date: 2011;
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Keywords: quantum dots; luminescence; synthesis; characterization

ABSTRACT
CdHgTe alloyed quantum dots (QDs) were directly synthesized in aqueous solution by heating a mixture of CdCl2, HgCl2 and NaHTe in the presence of thioglycolic acid as stabilizer. The obtained QDs were characterized by fluorescent spectroscope, fourier transform infrared spectroscope (FTIR), X―ray powder diffraction (XRD) and transmission electron microscope (TEM), respectively. The results show that the technique lead to the formation of CdHgTe alloyed QDs with broad fluorescence full―width at half―maximum (70―90 nm), moderate photoluminescence quantum yield (1.5%―6.7%), and a broad emission spectra tunable from 536 nm to 688 nm. The water―soluble alloyed QDs with thioglycolic acid modification for CdHgTe are of zinc―blended crystal structure in a sphere―like shape.
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