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Portrait of Reine Wallenberg. Photo: Kennet Ruona

Reine Wallenberg

Professor, Coordinator Materials Science

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Understanding the 3D structure of GaAs nanowires

Author

  • Lisa Karlsson
  • Kimberly Dick Thelander
  • Jakob Wagner
  • Jan-Olle Malm
  • Knut Deppert
  • Lars Samuelson
  • Reine Wallenberg

Summary, in English

The effects of lamellar twinning in epitaxial particle-assisted GaAs <111>B nanowires are investigated in an extensive high resolution electron

microscopy (HRTEM) study of the low index zones <-100>, <-1-10>, <1-1-1> and

<1-1-2>. As these directions are non-parallel to the (-1-1-1) twin planes we find

that the twin segments exhibit two different zone axes as a consequence of

twinning. In the first three cases the alternative zones were found to be <1-2-2>

<11-4> and <11-5>. These findings are supported by a comparison of

experimental HRTEM images and multi-slice simulations along with fast

Fourier transform mapping. From the appearance of non-overlapping regions

we conclude that the nanowires are bound by {111} facets only. The twin

formation and the development of the stable side facets are discussed

Department/s

  • Centre for Analysis and Synthesis
  • Solid State Physics

Publishing year

2007

Language

English

Publication/Series

Nanotechnology

Volume

18

Issue

48

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Nano Technology

Status

Published

ISBN/ISSN/Other

  • ISSN: 0957-4484