Probing dielectrophoretic force fields with metallic carbon nanotubes

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...

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Bibliographic Details
Published in:Applied physics letters 2006-10, Vol.89 (18), p.183117-183117-3
Main Authors: Marquardt, Christoph W., Blatt, Sabine, Hennrich, Frank, Löhneysen, Hilbert v., Krupke, Ralph
Format: Article
Language:English
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2372771