Synthesis of metal chalcogenide quantum

Details Synthesis of metal chalcogenide quantum Synthesis of metal chalcogenide quantum

1997-08-12

1999-06-01

Straub, Gary P.

Chemistry of inorganic compounds

Selenium or tellurium or compound thereof

Binary compound

4235611, 4235661, 423104, C01B 1720, C01B 1904, C01G 900

Patent

active

059086084

ABSTRACT:
An aqueous system for the production of metal chalcogenide nanocrystalline salts such as zinc selenide, from a hydrolyzable chalcogen carbonyl compound, such as selenourea, by simple hydrolysis thereof under alkaline conditions in the presence of water soluble metal hydroxide, such as zinc hydroxide in the form of the zincate ion, i.e., Zn(OH).sub.4.sup.-2. Selenourea contains selenium in the correct oxidation state, is inexpensive, commercially-available and readily hydrolyzable under aqueous basic conditions in the presence of the zincate ion to form zinc selenide. The zinc selenide is insoluble in the alkaline aqueous vehicle and precipitates over time in the form of nanocrystallites or quantum dots of the zinc selenide.

REFERENCES:
patent: 3714339 (1973-01-01), Vecht
Low et al. "The Fabrication of Light-Emitting Devices from Hot-Pressed ZnSe Powders" J. of Material Science, vol. 13 No. 1 pp. 72-76, Jan. 1978.
Grant and Haekh's "Chemical Dictionary" Edited by Grant et al. 5th Edition, McGraw-Hill Book Co. USA, pp. 114-115, No Month 1987.
"Synthesis and Characterization of II-VI Semiconductor Nanocrystallites", Murray et al., JACS, vol. 115, pp. 8706-8715 (1993) No Month, No. 19.
"Synthesis and Stuctural Characterization of IIVoI Semiconductor Nanocrystallites", by Murray et al., Supplement ot Z. Physics. D 26, pp. 231-233 (1993) No Month.

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