Nano Research

, Volume 3, Issue 7, pp 528–536

Direct comparison of catalyst-free and catalyst-induced GaN nanowires

  • Caroline Chèze
  • Lutz Geelhaar
  • Oliver Brandt
  • Walter M. Weber
  • Henning Riechert
  • Steffen Münch
  • Ralph Rothemund
  • Stephan Reitzenstein
  • Alfred Forchel
  • Thomas Kehagias
  • Philomela Komninou
  • George P. Dimitrakopulos
  • Theodoros Karakostas
Open AccessResearch Article

DOI: 10.1007/s12274-010-0013-9

Cite this article as:
Chèze, C., Geelhaar, L., Brandt, O. et al. Nano Res. (2010) 3: 528. doi:10.1007/s12274-010-0013-9

Abstract

GaN nanowires have been grown by molecular beam epitaxy either catalyst-free or catalyst-induced by means of Ni seeds. Under identical growth conditions of temperature and V/III ratio, both types of GaN nanowires are of wurtzite structure elongated in the Ga-polar direction and are constricted by M-plane facets. However, the catalyst-induced nanowires contain many more basal-plane stacking faults and their photoluminescence is weaker. These differences can be explained as effects of the catalyst Ni seeds.

Keywords

Nanowire nanocolumn molecular beam epitaxy (MBE) photoluminescence stacking faults catalyst 
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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Caroline Chèze
    • 1
    • 5
  • Lutz Geelhaar
    • 1
    • 5
  • Oliver Brandt
    • 1
  • Walter M. Weber
    • 2
    • 5
  • Henning Riechert
    • 1
    • 4
  • Steffen Münch
    • 3
  • Ralph Rothemund
    • 3
  • Stephan Reitzenstein
    • 3
  • Alfred Forchel
    • 3
  • Thomas Kehagias
    • 4
  • Philomela Komninou
    • 4
  • George P. Dimitrakopulos
    • 4
  • Theodoros Karakostas
    • 4
  1. 1.Paul-Drude-Institut für FestkörperelektronikBerlinGermany
  2. 2.NaMLab gGmbHDresdenGermany
  3. 3.Technische PhysikUniversität WürzburgWürzburgGermany
  4. 4.Physics DepartmentAristotle UniversityThessalonikiGreece
  5. 5.QimondaMunichGermany