Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Knut Deppert

Knut Deppert

Professor

Knut Deppert

Size- and shape-controlled GaAs nano-whiskers grown by MOVPE: a growth study

Author

  • Magnus Borgström
  • Knut Deppert
  • Lars Samuelson
  • Werner Seifert

Summary, in English

We have investigated the Au-catalyzed GaAs <111 > B whisker growth under low-pressure metal-organic vapour phase epitaxy conditions. By varying the growth temperature we found a maximum in the whisker growth rate at about 450-475degreesC. With increasing temperature the growth rate decreases due to competing growth at the (111) substrate surface and at the {I 101 whisker side facets, which leads to significant tapering of the whiskers. For low temperatures, the growth rate R in the In R = f (1/T)-plot results in an Arrhenius activation energy of about 67-75 kJ/mol, a value which is in agreement with activation energies reported for low-temperature planar growth of GaAs from TMG and AsH3. The Au acts as a local catalyst and as a collector of reactants, enabling a liquid-phase-epitaxy-like growth with high growth rates at the GaAs (111)B/(Au,Ga) interface.

Department/s

  • Solid State Physics

Publishing year

2004

Language

English

Pages

18-22

Publication/Series

Journal of Crystal Growth

Volume

260

Issue

1-2

Document type

Journal article

Publisher

Elsevier

Topic

  • Condensed Matter Physics

Keywords

  • materials
  • semiconducting III-V
  • nanostructures
  • metalorganic vapor phase epitaxy

Status

Published

ISBN/ISSN/Other

  • ISSN: 0022-0248