Patent ID: 8017181
Filing Date: 2011-09-13
Classification: C01B,C01P,C09C,Y10T

Abstract:
1. A method for preparing a nanoparticle having a core/shell structure which comprises: (i) preparing CdSe core nanoparticle in a powder form; (ii) dissolving a ZnS or ZnSe shell precursor in a solvent to form a shell precursor solution: (iii) heating the shell precursor solution at an elevated temperature to prevent self-nucleation of the shell precursor and stabilize the shell precursor solution; (iv) adding the powder form of the core nanoparticle into the pre-heated stabilized shell precursor solution: (v) maintaining the temperature of the solution for a time period sufficient to form an overcoat on the surface of the core nanoparticle; (vi) monitoring the growth of the overcoat being formed on the surface of the core nanoparticle; and (vii) cooling the solution to terminate the growth of the shell overcoat.