1. Three-dimensional structure of CdX (X=Se,Te) nanocrystals by total x-ray diffraction.
- Author
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Pradhan, S. K., Deng, Z. T., Tang, F., Wang, C., Ren, Y., Moeck, P., and Petkov, V.
- Subjects
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SEMICONDUCTORS , *QUANTUM dots , *QUANTUM electronics , *DISTRIBUTION (Probability theory) , *OLEIC acid , *SYNCHROTRON radiation , *NANOCRYSTALS - Abstract
The three-dimensional structure of oleic acid-capped CdSe and thiol-capped CdTe nanocrystals used as quantum dots has been determined by total synchrotron radiation x-ray diffraction and atomic pair distribution function analysis. Both CdSe and CdTe are found to exhibit the zinc-blende-type atomic ordering. It is only slightly distorted in CdSe implying the presence of nanosize domains and very heavily distorted in CdTe due to the presence of distinct core-shell regions. The results well demonstrate the great potential of the experimental approach and thus encourage its wider application in quantum dot research. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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