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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:
[email protected], 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:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Tosifa A. Memon
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Nathan J. Withers
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Shin T. Bowers
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Tingyi Gu
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Jiangjiang Gu
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Melisa R. Greenberg
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Gennady A. Smolyakov
Affiliation:
[email protected], University of New Mexico, Center for High Technology Materials, 1313 Goddard SE, Albuquerque, NM, 87106-4343, United States
Marek Osinski
Affiliation:
[email protected], 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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References

1. Shim, M., Guyot-Sionnest, P., “Organic-capped ZnO nanocrystals: Synthesis and n-type character”, J. Am. Chem. Soc. 123 (47), 11651–11654, 1 Nov. 2001.Google Scholar
2. Radovanovic, P. V., Norberg, N. S., McNally, K. E., Gamelin, D. R., “Colloidal transition-metal-doped ZnO quantum dots”, J. Am. Chem. Soc. 124 (51), 15192–15193, 25 Dec. 2002.Google Scholar
3. Cozzoli, P. D., Curri, M. L., Agostiano, A., Leo, G., Lomascolo, M., “ZnO nanocrystals by a nonhydrolytic route: Synthesis and characterization”, J. Phys. Chem. B 107 (20), 4756–4762, 22 May 2003.Google Scholar
4. Hambrock, J., Rabe, S., Merz, K., Birkner, A., Wohlfart, A., Fischer, R. A., Driess, M., “Low-temperature approach to high surface ZnO nanopowders and a non-aqueous synthesis of ZnO colloids using the single-source precursor [MeZnOSiMe3]4 and related zinc siloxides”, J. Mater. Chem. 13 (7), 1731–1736 (2003).Google Scholar
5. Kim, C. G., Sung, K. W., T-M Chung, Jung, D. Y., Kim, Y. S.. “Monodispersed ZnO nanoparticles from a single molecular precursor”, Chem. Comm. #16, 2068–2069 (2003).Google Scholar
6. Boyle, T. J., Bunge, S. D., Andrews, N. L., Matzen, L. E., Sieg, K., Rodriguez, M. A., Headley, T. J., “Precursor structural influences on the final ZnO nanoparticle morphology from a novel family of structurally characterized zinc alkoxy alkyl precursors”, Chem. Mater. 16 (17), 3279–3288, 24 Aug. 2004.10.1021/cm0493997Google Scholar
7. Carnes, C. L., Klabunde, K. L., “Synthesis, isolation, and chemical reactivity studies of nanocrystalline zinc oxide”, Langmuir 16 (8), 3764–3772, 18 April 2000.10.1021/la991498pGoogle Scholar
8. Demir, M. M., Muñoz-Espi, R., Lieberwirth, I., Wegner, G., “Precipitation of monodisperse ZnO nanocrystals via acid-catalyzed esterification of zinc acetate”, J. Mater. Chem. 16 (28), 2940–2947 (2006).10.1039/B601451HGoogle Scholar
9. Sze, S. M., Physics of Semiconductor Devices, Wiley-Interscience, New York 1981, p. 848.Google Scholar
10. Vanheusden, K., Warren, W. L., Seager, C. H., Tallant, D. R., Voigt, J. A., Gnade, B. E., “Mechanisms behind green photoluminescence in ZnO phosphor powders”, J. Appl. Phys. 79 (10), 7983–7990, 15 May 1996.Google Scholar
11. Wilkinson, J., Ucer, K. B., Willams, R. T., “Picosecond excitonic luminescence in ZnO and other wide-gap semiconductors”, Radiation Measurements 38, 501–505 (2004).10.1016/j.radmeas.2004.01.022Google Scholar