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Portrait of Reine Wallenberg. Photo: Kennet Ruona

Reine Wallenberg

Professor, Coordinator Materials Science

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Probing of individual semiconductor nanowhiskers by TEM-STM

Author

  • Magnus Larsson
  • Reine Wallenberg
  • Ann Persson
  • Lars Samuelson

Summary, in English

Along with rapidly developing nanotechnology, new types of analytical instruments and techniques are needed. Here we report an alternative procedure for electrical measurements on semiconductor nanowhiskers, allowing precise selection and visual control at close to atomic resolution. We use a combination of two powerful microscope techniques, scanning tunneling microscopy (STM) and simultaneous viewing in a transmission electron microscope (TEM). The STM is mounted in the sample holder for the TEM. We describe here a method for creating an ohmic contact between the STM tip and the nanowhisker. We examine three different types of STM tips and present a technique for cleaning the STM tip in situ. Measurements on 1-mum-tall and 40-nm-thick epitaxially grown InAs nanowhiskers show an ohmic contact and a resistance of down to 7 kOmega.

Department/s

  • Centre for Analysis and Synthesis
  • Solid State Physics

Publishing year

2004

Language

English

Pages

41-46

Publication/Series

Microscopy and Microanalysis

Volume

10

Issue

1

Document type

Journal article

Publisher

Cambridge University Press

Topic

  • Chemical Sciences
  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1435-8115