Patent ID: 7731932

Claim:
A method of processing nanocrystals, comprising: providing the nanocrystals in a first solvent in which the nanocrystals are soluble, the nanocrystals having a total amount of surfactant associated therewith, the total amount of surfactant including an amount of free surfactant and an amount of nanocrystal bound surfactant; precipitating the nanocrystals by adding a second solvent of higher polarity to the first solvent to provide a precipitating solvent mixture in which the nanocrystals are insoluble, to provide precipitated nanocrystals; separating the precipitated nanocrystals from the precipitating solvent mixture; and redissolving the nanocrystals by adding a third solvent in which the nanocrystals are soluble to the precipitated nanocrystals.