University of Utah Research Foundation

National Science Foundation

Michael Hans Risbud Bartl

Jacqueline T Siy

Methods for precise and predictable modification of previously synthesized nanocrystals. The methods rely on the solubility behavior of crystalline materials to provide for controlled reversal of the nanocrystal growth process (i.e., dissolution). A method for post-synthesis modification of colloidal nanocrystals includes (1) providing a first nanocrystal having a first size and a first shape, (2) forming a reaction mixture that includes the nanocrystal, at least one ligand capable of binding to at least one component of the nanocrystal, at least one solvent, and an inert gas atmosphere, and (3) modifying the size and/or shape of the nanocrystal in the reaction mixture for a period of time at a temperature in a range from about 100&#xb0; C. to about 240&#xb0; C. so as to produce at least a second nanocrystal having a second size and/or a second shape.

Modification of colloidal nanocrystals

Low-temperature organometallic nucleation and crystallization-based synthesis methods for the fabrication of semiconductor and metal colloidal nanocrystals with narrow size distributions and tunable, size- and shape-dependent electronic and optical properties. Methods include (1) forming a reaction mixture in a reaction vessel under an inert atmosphere that includes at least one solvent, a cationic precursor, an anionic precursor, and at least a first surface stabilizing ligand while stirring at a temperature in a range from about 50&#xb0; C. to about 130&#xb0; C. and (2) growing nanocrystals in the reaction mixture for a period of time while maintaining the temperature, the stirring, and the inert-gas atmosphere.

Growing community of inventors

Cupertino, CA, United States of America

Michael Hans Risbud Bartl