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Colloidal Synthesis and Characterization of Optically Active ZnO/ZnS Core/Shell Nanocrystals

Published online by Cambridge University Press:  01 February 2011

Krishnaprasad Sankar ,
Brian A. Akins ,
Tosifa A. Memon ,
Nathan J. Withers ,
Shin T. Bowers ,
Tingyi Gu ,
Jiangjiang Gu ,
Melisa R. Greenberg ,
Gennady A. Smolyakov  and
Marek Osinski
Krishnaprasad Sankar
Affiliation:
osinski@chtm.unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States, (505) 272-7812, (505) 272-7801
Brian A. Akins
Affiliation:
bakins@chtm.unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Tosifa A. Memon
Affiliation:
tmemon@unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Nathan J. Withers
Affiliation:
nwithers@chtm.unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Shin T. Bowers
Affiliation:
Shin_Bowers@brown.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Tingyi Gu
Affiliation:
tgu@unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Jiangjiang Gu
Affiliation:
jjgu@unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Melisa R. Greenberg
Affiliation:
mgreenb@chtm.unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Gennady A. Smolyakov
Affiliation:
gen@chtm.unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Marek Osinski
Affiliation:
osinski@chtm.unm.edu, University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
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Abstract

ZnO colloidal nanocrystals have been synthesized using two different approaches and characterized by HRTEM, EDS, and photoluminescence spectroscopy. ZnO nanocrystals synthesized from zinc alkoxy alkyl precursors in the MeIm/H2O coordinating solvent showed only visible surface-defect related emission in their PL spectra. No band-to-band UV emission was observed after ZnS coating of those ZnO nanocrystals. In contrast, a strong band-to-band UV emission dominated PL spectra of ZnO nanocrystals synthesized through wet-chemical acid-catalyzed esterification of zinc acetate.

Keywords

core/shellnanoscaleoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1035: Symposium L – Zinc Oxide and Related Materials–2007 , 2007 , 1035-L11-12
Copyright
Copyright © Materials Research Society 2008

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