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Title: Colloidal nanocrystals and method of making

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.
Inventors:
Issue Date:
OSTI Identifier:
1222597
Assignee:
The Research Foundation for the State University of New York (Amherst, NY) DOEEE
Patent Number(s):
9,153,731
Application Number:
14/454,293
Contract Number:
EE0000979
Resource Relation:
Patent File Date: 2014 Aug 07
Research Org:
The Research Foundation for the State University of New York, Amherst, NY (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Works referenced in this record:

Synthesis and Characterization of Strongly Luminescing ZnS-Capped CdSe Nanocrystals
journal, January 1996
  • Hines, Margaret A.; Guyot-Sionnest, Philippe
  • The Journal of Physical Chemistry, Vol. 100, Issue 2, p. 468-471
  • DOI: 10.1021/jp9530562

Ligand exchange reactions in InGaAs metalorganic vapor-phase epitaxy
journal, July 1998