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Title: Colloidal nanocrystals and method of making

Abstract

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

Citation Formats

Kahen, Keith. Colloidal nanocrystals and method of making. United States: N. p., 2015. Web.
Kahen, Keith. Colloidal nanocrystals and method of making. United States.
Kahen, Keith. Tue . "Colloidal nanocrystals and method of making". United States. doi:. https://www.osti.gov/servlets/purl/1222597.
@article{osti_1222597,
title = {Colloidal nanocrystals and method of making},
author = {Kahen, Keith},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 06 00:00:00 EDT 2015},
month = {Tue Oct 06 00:00:00 EDT 2015}
}

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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