Anisotropic alloying: Formation of atomic scale trellis on the Si(100)-(2  ×  1) surface

•Growth of bimetallic AgIn nanostructures was studied using STM.•Formation of unusuall trelis-like structures observed.•Result of competitive growth of mutually perpendicular In and Ag chains.•A corresponding atomic model of structure developed. [Display omitted] Early stages of growth of two-dimens...

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Bibliographic Details
Published in:Surface science 2018-11, Vol.677, p.8-11
Main Authors: Sobotík, P., Kocán, P., Ošt’ádal, I.
Format: Article
Language:English
Subjects:
Alloys
Anisotropy
Bimetallic structures
Bimetals
Chains
High temperature
Indium
Islands
Nanostructured materials
Nanostructures
Scanning tunneling microscopy
Silicon
Silver
Temperature effects
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Summary:•Growth of bimetallic AgIn nanostructures was studied using STM.•Formation of unusuall trelis-like structures observed.•Result of competitive growth of mutually perpendicular In and Ag chains.•A corresponding atomic model of structure developed. [Display omitted] Early stages of growth of two-dimensional bimetallic Ag–In islands on the Si(100)-(2  ×  1) surface were studied by means of scanning tunneling microscopy. Mixing the two different metals, one forms 1D chains on the Si(100)-(2  ×  1) surface and the other one creates 2D islands, results in anisotropic 2D lattice structures formed of indium chains connected by perpendicular silver chains. Growth at elevated temperatures results in more ordered structures. A model of the observed bimetallic structures and a growth scenario based on experimental data are proposed.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2018.05.010