Anisotropic oxidation of bismuth nanostructures: Evidence for a thin film allotrope of bismuth

作者：Kowalczyk P J^*; Belic D; Mahapatra O; Brown S A; Kadantsev E S; Woo T K; Ingham B; Kozlowski W

来源：Applied Physics Letters, 2012, 100(15): 151904.

DOI：10.1063/1.3701166

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.

• 出版日期2012-4-9