In-situ UHV TEM study of the two-dimensional growth of Al2Au phase on Al(111) surface

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Abstract

Al and Au have been deposited successively inside an UHV specimen chamber of a transmission electron microscope (TEM) onto amorphous carbon substrate layer to study the formation kinetics of Al2Au crystals. The Al2Au phase developed on the Al film (having a texture) starting with the Au deposition. Direct observation of the growth of two-dimensional islands proved that the scalloping of islands and the incorporation of holes take place during their continuous lateral growth. Their formation is due to oxide islands formed during oxygen exposure preceding the Au deposition on the {111} faces of Al crystals. Larger Al2Au islands exhibit a mosaic structure of crystals with two kinds of azimuthal orientations (Al2Au{norm of matrix} Al and Al2Au{norm of matrix}Al). According to diffraction studies and dark field imaging, twinned Au crystals seem to exist on the surface of Al2Au islands.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalUltramicroscopy
Volume15
Issue number1-2
DOIs
Publication statusPublished - 1984

Fingerprint

Electron microscopes
electron microscopes
Crystals
norms
crystals
scalloping
Amorphous carbon
Crystal orientation
Oxides
matrices
Textures
Diffraction
Oxygen
Imaging techniques
textures
chambers
Kinetics
Substrates
oxides
carbon

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation

Cite this

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title = "In-situ UHV TEM study of the two-dimensional growth of Al2Au phase on Al(111) surface",
abstract = "Al and Au have been deposited successively inside an UHV specimen chamber of a transmission electron microscope (TEM) onto amorphous carbon substrate layer to study the formation kinetics of Al2Au crystals. The Al2Au phase developed on the Al film (having a texture) starting with the Au deposition. Direct observation of the growth of two-dimensional islands proved that the scalloping of islands and the incorporation of holes take place during their continuous lateral growth. Their formation is due to oxide islands formed during oxygen exposure preceding the Au deposition on the {111} faces of Al crystals. Larger Al2Au islands exhibit a mosaic structure of crystals with two kinds of azimuthal orientations (Al2Au{norm of matrix} Al and Al2Au{norm of matrix}Al). According to diffraction studies and dark field imaging, twinned Au crystals seem to exist on the surface of Al2Au islands.",
author = "A. Barna and P. Barna and G. Radn{\'o}czi and G. S{\'a}fr{\'a}n",
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T1 - In-situ UHV TEM study of the two-dimensional growth of Al2Au phase on Al(111) surface

AU - Barna, A.

AU - Barna, P.

AU - Radnóczi, G.

AU - Sáfrán, G.

PY - 1984

Y1 - 1984

N2 - Al and Au have been deposited successively inside an UHV specimen chamber of a transmission electron microscope (TEM) onto amorphous carbon substrate layer to study the formation kinetics of Al2Au crystals. The Al2Au phase developed on the Al film (having a texture) starting with the Au deposition. Direct observation of the growth of two-dimensional islands proved that the scalloping of islands and the incorporation of holes take place during their continuous lateral growth. Their formation is due to oxide islands formed during oxygen exposure preceding the Au deposition on the {111} faces of Al crystals. Larger Al2Au islands exhibit a mosaic structure of crystals with two kinds of azimuthal orientations (Al2Au{norm of matrix} Al and Al2Au{norm of matrix}Al). According to diffraction studies and dark field imaging, twinned Au crystals seem to exist on the surface of Al2Au islands.

AB - Al and Au have been deposited successively inside an UHV specimen chamber of a transmission electron microscope (TEM) onto amorphous carbon substrate layer to study the formation kinetics of Al2Au crystals. The Al2Au phase developed on the Al film (having a texture) starting with the Au deposition. Direct observation of the growth of two-dimensional islands proved that the scalloping of islands and the incorporation of holes take place during their continuous lateral growth. Their formation is due to oxide islands formed during oxygen exposure preceding the Au deposition on the {111} faces of Al crystals. Larger Al2Au islands exhibit a mosaic structure of crystals with two kinds of azimuthal orientations (Al2Au{norm of matrix} Al and Al2Au{norm of matrix}Al). According to diffraction studies and dark field imaging, twinned Au crystals seem to exist on the surface of Al2Au islands.

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