SYNTHESIS, CAPPING AND DISPERSION OF NANOCRYSTALS

摘要

Preparation of semiconductor nanocrystals and their dispersions in solvents and other media is described. The nanocrystals described herein have small (1-10 nm) particle size with minimal aggregation and can be synthesized with high yield. The capping agents on the as-synthesized nanocrystals as well as nanocrystals which have undergone cap exchange reactions result in the formation of stable suspensions in polar and nonpolar solvents which may then result in the formation of high quality nanocomposite films.

主权项

1. Nanocrystals formed by a solvothermal method, said method comprising
dissolving or mixing at least one precursor of said nanocrystals in at least one solvent to produce a solution, heating said solution to a temperature in the range of greater than a temperature of 250° C. to a temperature of 350° C. and a pressure in the range of 100-900 psi to form said nanocrystals, wherein said nanocrystals are comprised of at least one of hafnium oxide, zirconium oxide, hafnium-zirconium oxide and titanium-zirconium oxide, and wherein said at least one precursor is selected from the group consisting of at least one of an alkoxide, an acetate, an acetylacetonate, and a halide, such that when said nanocrystals consists of zirconium oxide, said precursor is not a chloride.