Three-dimensional structure of CdX „X=Se,Te... nanocrystals by total x-ray diffraction

نویسندگان

  • S. K. Pradhan
  • Z. T. Deng
  • F. Tang
  • C. Wang
  • V. Petkov
چکیده

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. © 2007 American Institute of Physics. DOI: 10.1063/1.2767615

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تاریخ انتشار 2007