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Knut Deppert

Knut Deppert

Professor

Knut Deppert

The structure of <1 1 1 > B oriented GaP nanowires

Author

  • Jonas Johansson
  • Lisa Karlsson
  • Patrik Svensson
  • Thomas Mårtensson
  • Brent Wacaser
  • Knut Deppert
  • Lars Samuelson

Summary, in English

Nanowires of zinc blende crystal structure, grown in the < 111 > B direction usually have a large number of twin plane defects. In order to investigate this phenomenon, we grow GaP nanowires with metal-organic vapor phase epitaxy. By rotating the nanowires in a high resolution transmission electron microscope, we show that the nanowire segments between the twin planes are of octahedral shape and are terminated by {111} facets. Due to the alternating orientations of these twin octahedra, the sidewalls of the nanowires can be described as microfaceted surfaces with an overall orientation of 11 1 2}, but composed of alternating 11 1 I}A and {1 I 1}B facets. Moreover, the segment thicknesses follow exponential distributions, which show that there is a certain probability of twin plane formation, which is independent of segment thickness. (c) 2006 Elsevier B.V. All rights reserved.

Department/s

  • Solid State Physics
  • Centre for Analysis and Synthesis

Publishing year

2007

Language

English

Pages

635-639

Publication/Series

Journal of Crystal Growth

Volume

298

Document type

Journal article

Publisher

Elsevier

Topic

  • Condensed Matter Physics
  • Chemical Sciences

Keywords

  • metalorganic vapor phase epitaxy
  • nanomaterials
  • crystal morphology
  • planar defects

Status

Published

ISBN/ISSN/Other

  • ISSN: 0022-0248