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Probing dielectrophoretic force fields with metallic carbon nanotubes

Marquardt, Christoph W. and Blatt, Sabine and Hennrich, Frank and Löhneysen, Hilbert v. and Krupke, Ralph (2006):
Probing dielectrophoretic force fields with metallic carbon nanotubes.
In: Applied Physics Letters, 89 (18), pp. 183117(1-3), ISSN 00036951,
[Online-Edition: http://dx.doi.org/10.1063/1.2372771],
[Article]

Abstract

The authors show that single-walled carbon nanotubes are effective probes for dielectrophoretic force fields by studying their deposition pattern on surfaces. Different force fields were generated by electrodes on insulating oxides, with or without conducting substrates underneath. The patterns were recorded by scanning electron microscopy and simulated by finite element calculations. The data show that a sign change of the normal component of the dielectrophoretic force close to the substrate surface can lead to a repulsion of metallic carbon nanotubes from the surface. The authors present geometrical constraints to avoid such a sign change in the dielectrophoretic force.

Item Type: Article
Erschienen: 2006
Creators: Marquardt, Christoph W. and Blatt, Sabine and Hennrich, Frank and Löhneysen, Hilbert v. and Krupke, Ralph
Title: Probing dielectrophoretic force fields with metallic carbon nanotubes
Language: English
Abstract:

The authors show that single-walled carbon nanotubes are effective probes for dielectrophoretic force fields by studying their deposition pattern on surfaces. Different force fields were generated by electrodes on insulating oxides, with or without conducting substrates underneath. The patterns were recorded by scanning electron microscopy and simulated by finite element calculations. The data show that a sign change of the normal component of the dielectrophoretic force close to the substrate surface can lead to a repulsion of metallic carbon nanotubes from the surface. The authors present geometrical constraints to avoid such a sign change in the dielectrophoretic force.

Journal or Publication Title: Applied Physics Letters
Volume: 89
Number: 18
Uncontrolled Keywords: carbon nanotubes, scanning electron microscopy, finite element analysis, probes, electrophoresis, electrodeposition
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 08 Nov 2011 12:52
Official URL: http://dx.doi.org/10.1063/1.2372771
Identification Number: doi:10.1063/1.2372771
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