Anisotropic oxidation of bismuth nanostructures: Evidence for a thin film allotrope of bismuth
- 9 April 2012
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 100 (15), 151904
- https://doi.org/10.1063/1.3701166
Abstract
We present evidence that ultra-thin Bi(110) nanostructures oxidise from the edges, and that their top surfaces remain unoxidised. Even after prolonged oxidation, clean (unoxidised) bismuth is present in nanostructures that are less than 5 monolayers thick. Since the (110) surface of bulk bismuth is known to be readily oxidised, this is strong evidence for a thin film allotrope of bismuth. We present a comparison with calculated structures and the structures of polymeric nitrogen, which suggests that the allotrope is one of several complex or hybrid paired-layer structures.Keywords
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