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Optical Properties of CdSe Nanoparticle Assemblies

Published online by Cambridge University Press:  01 February 2011

F. Rafael Leon ,
Natalia Zaitseva ,
Daniele Gerion ,
Thomas Huser  and
Denise Krol
F. Rafael Leon
Affiliation:
Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, CA 94550, U.S.A. University of California at Davis, 3001 EU III, One Shields Avenue Davis, CA 95616, U.S.A.
Natalia Zaitseva
Affiliation:
Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, CA 94550, U.S.A.
Daniele Gerion
Affiliation:
Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, CA 94550, U.S.A.
Thomas Huser
Affiliation:
Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, CA 94550, U.S.A.
Denise Krol
Affiliation:
Lawrence Livermore National Laboratory, 7000 East Avenue Livermore, CA 94550, U.S.A. University of California at Davis, 3001 EU III, One Shields Avenue Davis, CA 95616, U.S.A.
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Abstract

We report on three-dimensional fluorescence imaging of micron-size faceted crystals precipitated from solutions of CdSe nanocrystals. Such crystals have previously been suggested to be superlattices of CdSe quantum dots [1,2]. Possible applications for these materials include their use in optical and optoelectronic devices. The micron-size crystals were grown by slow evaporation from toluene solutions of CdSe nanocrystals in the range of 3–6 nm, produced by traditional wet-chemistry techniques. By using a confocal microscope with laser illumination, three-dimensional raster-scanning and synchronized hyper-spectral detection, we have generated spatial profiles of the fluorescence emission intensity and spectrum. The fluorescence data of the micro-crystals were compared with spectra of individual nanocrystals obtained from the same solution. The results do not support the assertion that these microcrystals consist of CdSe superlattices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 789 , 2003 , N11.13
Copyright
Copyright © Materials Research Society 2004

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References

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