Electrodeposited quantum dots IV. Epitaxial short-range order in amorphous semiconductor nanostructures

Yuval Golan, Evgeny Ter-Ovanesyan, Yishay Manassen, Lev Margulis, Gary Hodes, Israel Rubinstein, Erica G. Bithell, John L. Hutchison

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The structure of diffraction-amorphous CdSe (a-CdSe) quantum dots (QDs) electrodeposited on evaporated Pd substrate was studied by high resolution transmission electron microscopy (HRTEM), and compared with epitaxial (crystalline) QDs obtained by the same procedure on Au, as well as with a simulated image of random a-CdSe. Digital analysis of HRTEM images established the existence of repeating ordered motifs in a-CdSe QDs on Pd substrates, in the form of epitaxial sub-nanometre to nanometre size clusters. The QDs are shown to be intermediate between crystalline and random amorphous material. Digital Fourier analysis indicated epitaxial relationship with the {111}Pd substrate, rotated 30° relative to the orientational relationship on {111}Au.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalSurface Science
Volume350
Issue number1-3
DOIs
StatePublished - 20 Apr 1996
Externally publishedYes

Keywords

  • Amorphous thin films
  • Cadmium selenide
  • Crystalline-amorphous interfaces
  • Electrochemical methods
  • Electron microscopy
  • Epitaxy
  • Palladium
  • Quantum effects

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