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. A zirconia nanocrystal dispersion comprising a dispersion solvent, said dispersion having a minimum transmittance of larger than 15% when measured in a cuvette with a 10 mm path length in the wavelength region from 400 nm to 750 nm when the dispersion contains 10% by weight nanocrystals in the dispersion solvent,
said zirconia nanocrystals of the dispersion comprising at least one capping agent, and wherein the dispersion has a free capping agent concentration below 100,000 micrograms/ml as measured by GC.