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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)
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. 2015. "Colloidal nanocrystals and method of making". United States. 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 = {},
url = {https://www.osti.gov/biblio/1222597}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 06 00:00:00 EDT 2015},
month = {Tue Oct 06 00:00:00 EDT 2015}
}

Works referenced in this record:

Highly luminescent color-selective nano-crystalline materials
patent, November 2001


Method of making highly-confined semiconductor nanocrystals
patent, July 2014


Quantum Dots Having Composition Gradient Shell Structure and Manufacturing Method Thereof
patent-application, June 2010


Electron–vibration coupling in semiconductor clusters studied by resonance Raman spectroscopy
journal, April 1989


Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
journal, August 2000


Electrophilicity Index
journal, March 1999


Synthesis and Characterization of Strongly Luminescing ZnS-Capped CdSe Nanocrystals
journal, January 1996


Formation of High Quality InP and InAs Nanocrystals in a Noncoordinating Solvent
journal, September 2002


Formation of High Quality InP and InAs Nanocrystals in a Noncoordinating Solvent
journal, September 2002


Accurate ab initio predictions of III–V direct-indirect band gap crossovers
journal, August 2010


Synthesis Routes for Large Volumes of Nanoparticles
journal, August 2004


Step-Wise Synthesis of InP/ZnS Core−Shell Quantum Dots and the Role of Zinc Acetate
journal, February 2009


Efficient and Color-Tunable Mn-Doped ZnSe Nanocrystal Emitters:  Control of Optical Performance via Greener Synthetic Chemistry
journal, March 2007


Improved Precursor Chemistry for the Synthesis of III–V Quantum Dots
journal, December 2012


Highly Luminescent CdTe/CdSe Colloidal Heteronanocrystals with Temperature-Dependent Emission Color
journal, December 2007

  • Chin, Patrick T. K.; de Mello Donegá, Celso; van Bavel, Svetlana S.
  • Journal of the American Chemical Society, Vol. 129, Issue 48
  • https://doi.org/10.1021/ja0738071

Temperature Dependence of the Photoluminescence of InP/ZnS Quantum Dots
journal, May 2008


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


State-Resolved Exciton−Phonon Couplings in CdSe Semiconductor Quantum Dots
journal, May 2008


Effects of Ligand Exchange Reactions on the Composition of Cd 1 - y Zn y Te Grown by Metalorganic Vapor-Phase Epitaxy
journal, June 1997


High-Temperature Luminescence Quenching of Colloidal Quantum Dots
journal, September 2012


Theory of the linear and nonlinear optical properties of semiconductor microcrystallites
journal, May 1987


Optical Gain and Stimulated Emission in Nanocrystal Quantum Dots
journal, October 2000