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Colloidal nanocrystals and method of making

United States Patent

9,153,731
October 6, 2015
View the Complete Patent at the US Patent & Trademark Office
A tight confinement nanocrystal comprises a homogeneous center region having a first composition and a smoothly varying region having a second composition wherein a confining potential barrier monotonically increases and then monotonically decreases as the smoothly varying region extends from the surface of the homogeneous center region to an outer surface of the nanocrystal. A method of producing the nanocrystal comprises forming a first solution by combining a solvent and at most two nanocrystal precursors; heating the first solution to a nucleation temperature; adding to the first solution, a second solution having a solvent, at least one additional and different precursor to form the homogeneous center region and at most an initial portion of the smoothly varying region; and lowering the solution temperature to a growth temperature to complete growth of the smoothly varying region.
Kahen; Keith (Rochester, NY)
The Research Foundation for the State University of New York (Amherst, NY)
14/ 454,293
20150041759
August 7, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made, at least in part, with support from the Department of Energy under Grant No. DE-EE0000979. The government may have certain rights in the invention.