Patent ID: 9162900
Filing Date: 2015-10-20
Classification: B82Y,C01G,C01P,C08K,C08L,Y10T

Abstract:
1. A method for the preparation of a composition of nanoparticles of metal oxide nanocrystals, of at least one crystalline metal oxide, the method comprising: preparing a liquid solution comprising at least one organometallic precursor that is spontaneously reactive to oxidation, in an aprotic solvent medium, in the presence of at least one water soluble organic PEG ligand which has at least one carbon chain, at least one end of which is functionalized by a coordinating group containing at least one hetero atom, and is soluble in said aprotic solvent medium; and contacting said liquid solution with at least one oxidizing agent for directly forming metal oxide nanocrystals, wherein: the at least one PEG ligand has the following general formula (I) wherein: R R n is an integer greater than or equal to 1; each PEG ligand is soluble in said aprotic solvent medium, and a water-compatible and organocompatible composition of metal oxide nanocrystals is obtained directly in one stage.