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TitleAnisotropic oxidation of bismuth nanostructures: Evidence for a thin film allotrope of bismuth
Publication TypeJournal Article
Year of Publication2012
AuthorsKowalczyk, P.J., Belic D., Mahapatra O., Brown S.A., Kadantsev E.S., Woo T.K., Ingham B., and Kozlowski W.
JournalApplied Physics Letters
Date Published2012
ISSN00036951 (ISSN)
Keywordsbismuth, Monolayers, Nanostructures, Polymeric nitrogens, Thin films, Top surface, Ultra-thin
AbstractWe 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. © 2012 American Institute of Physics.

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