Controlling the width of self-assembled dysprosium silicide nanowires on the Si(001) surface.
We present STM data that show that it is possible to use a metal induced 2 × 7 reconstruction of Si(001) to narrow the width distribution of Dy silicide nanowires. This behavior is distinct from the effect of the 7 × 7 reconstruction on the Si(111) surface, where the 7 × 7 serves as a static template and the deposited metal avoids the unit cell boundaries on the substrate. In this case, the 2 × 7 is a dynamic template, and the nanowires nucleate at anti-phase boundaries between 2 × 7 reconstruction domains.
Department of Materials Science and Engineering, University of Toronto, Toronto, ON, Canada.
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Cui
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Chung
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Nogami