Understanding the 3D structure of GaAs⟨111⟩B nanowires

Lisa S. Karlsson, Kimberly A. Dick, Jakob Birkedal Wagner, Jan-Olle Malm, Knut Deppert, Lars Samuelson, L. Reine Wallenberg

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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 >, <110 >, <111 > and <112 >. As these directions are non-parallel to the (111) 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 <122 > <114 > and <115 >. 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.
Original languageEnglish
Article number485717
JournalNanotechnology
Volume18
Issue number48
Number of pages10
ISSN0957-4484
DOIs
Publication statusPublished - 2007
Externally publishedYes

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