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Knut Deppert

Knut Deppert

Professor

Knut Deppert

Microscopic aspects of the deposition of nanoparticles from the gas phase

Author

  • TJ Krinke
  • Knut Deppert
  • MH Magnusson
  • F Schmidt
  • H Fissan

Summary, in English

The deposition process in a homogeneous electric field, and the subsequent microscopic arrangement of charged, metallic nanoparticles in the size range below 100 nm on flat substrate surfaces is described. The main aspect of the investigation is the transfer of the particles from a three-dimensional distribution in the gas phase into their arrangement on the substrate surface, in dependence on particle-particle interactions and on Brownian motion. For this purpose, a trajectory model has been developed, which takes into account the flow field above the substrate surface, the electric field, the interactions of incoming particles with the substrate surface and with already deposited particles, as well as Brownian motion. The results from the trajectory calculations are compared with experimental results, obtained by scanning electron microscopy investigations of deposition patterns, created by deposition of indium and gold nanoparticles in an electrostatic precipitator. The particle diameter, the particle charge, the substrate material, the electric field strength and the number of particles deposited per unit area have been varied. (C) 2002 Elsevier Science Ltd. All rights reserved.

Department/s

  • Solid State Physics

Publishing year

2002

Language

English

Pages

1341-1359

Publication/Series

Journal of Aerosol Science

Volume

33

Issue

10

Document type

Journal article

Publisher

Elsevier

Topic

  • Condensed Matter Physics

Keywords

  • ESP
  • deposition
  • nanoparticle
  • trajectory model
  • particle-particle
  • interactions

Status

Published

ISBN/ISSN/Other

  • ISSN: 0021-8502