Germanium nanowires sheathed with an oxide layer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Author(s)

  • Y. F. Zhang
  • Y. H. Tang
  • N. Wang
  • I. Bello
  • S. T. Lee

Detail(s)

Original languageEnglish
Pages (from-to)4518-4521
Journal / PublicationPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number7
Publication statusPublished - 15 Feb 2000

Abstract

We report how the structural arrangement of germanium nanowires optimizes surface stability and enables the formation of very thin free-standing crystalline wires. Ge nanowires consisting of a crystalline Ge core and an amorphous GeO2 sheath have been formed by laser ablation of a mixture of Ge and GeO2. The crystalline Ge core lies in the axial [211] direction and is terminated by the {111} facets on the surface. The GeO2 sheath saturates the surface bonds of the core, adapts to the core surface roughness, and prohibits the growth of the nanowire in the lateral direction. With such a core and sheath, the surface energy of the nanowire is reduced and the formation of very thin nanowires is thereby permitted. Phonon confinement in the Ge nanowires has been observed by Raman scattering. ©2000 The American Physical Society.

Citation Format(s)

Germanium nanowires sheathed with an oxide layer. / Zhang, Y. F.; Tang, Y. H.; Wang, N.; Lee, C. S.; Bello, I.; Lee, S. T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 61, No. 7, 15.02.2000, p. 4518-4521.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal