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31 July 2008
Shape Control of Doped Semiconductor Nanocrystals (d-Dots)
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Formation of Mn2+-doped ZnSe quantum dots (Mn: ZnSe d-dots) with both branched and nearly spherical shapes has been studied. Structure analysis indicates that the Mn2+ dopants were localized in the core of a branched nanocrystal. The growth of branched d-dots, rather than spherical ones, was achieved by simply varying the concentration of two organic additives, fatty acids, and fatty amines. The photoluminescence properties of the branched nanocrystals were explored and compared with those of the nearly spherical particles.
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Shape Control of Doped Semiconductor Nanocrystals (d-Dots)
)
Abstract
Formation of Mn2+-doped ZnSe quantum dots (Mn: ZnSe d-dots) with both branched and nearly spherical shapes has been studied. Structure analysis indicates that the Mn2+ dopants were localized in the core of a branched nanocrystal. The growth of branched d-dots, rather than spherical ones, was achieved by simply varying the concentration of two organic additives, fatty acids, and fatty amines. The photoluminescence properties of the branched nanocrystals were explored and compared with those of the nearly spherical particles.
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Acknowledgements
This work was supported by the National Science Foundation and the National Institute of Health. We thank Dr. Guoda Lian and Texas Instruments for EDS measurements.
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