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Electrodeposited quantum dots IV. Epitaxial short-range order in amorphous semiconductor nanostructures |
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| Authors: | Yuval Golan Evgeny Ter-Ovanesyan Yishay Manassen Lev Margulis Gary Hodes Israel Rubinstein Erica G. Bithell John L. Hutchison |
| Affiliation: | a Department of Materials and Interfaces, The Weizmann Institute of Science, Rehovot 76100, Israel b Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel c Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK |
| 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 111inPd substrate, rotated 30° relative to the orientational relationship on 111Au. |
| Keywords: | Amorphous thin films Cadmium selenide Crystalline-amorphous interfaces Electrochemical methods Electron microscopy Epitaxy Palladium Quantum effects |
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