Structure of Al deposits on nanometer-size islands of aluminum-oxide |
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Authors: | S Burkardt M Erbudak |
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Institution: | aLaboratory for Solid State Physics, ETH Zurich, 8093 Zurich, Switzerland;bDepartment of Physics, Boğaziçi University, 34342 Bebek, Istanbul, Turkey |
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Abstract: | Because of the immense structural mismatch between a crystal and a quasicrystal, the aluminum-oxide domains that grow on the pentagonal surface of icosahedral Al–Pd–Mn at high temperatures are in the order of a few nm large. Here, we exploit the small lateral extension of the oxide domains to grow crystalline Al particles in the same size-region by vapor deposition on them. Low-energy-electron diffraction and secondary-electron imaging investigations show that the nanocrystals expose their (1 1 1) faces parallel to the pentagonal surface of the quasicrystal, while the in-plane orientation of the crystallites is random. Spot-profile analysis of the diffracted beams indicate that the Al nanocrystals grow in 3 nm large domains up to a deposition thickness of 51 monolayers. |
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Keywords: | Al deposition Nanocrystals Al– Pd– Mn Quasicrystals Random orientation LEED |
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