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Real-Time Electrical Characterization of Dielectrophoretic Assembly of Multi-Walled Carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Libao An  and
Craig Friedrich
Libao An
Affiliation:
Michigan Technological University, Mechanical Engineering, MEEM Dept. 815 RL Smith, 1400 Townsend Drive, Houghton, MI, 49931, United States
Craig Friedrich
Affiliation:
[email protected], Michigan Technological University, Multi-Scale Technologies Institute, Houghton, MI, 49931, United States
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Abstract

This paper reports on a real-time monitoring method for the assembly of a small number of metallic carbon nanotubes (CNTs) by dielectrophoresis (DEP). A time-varying impedance model of the electrode gap was developed to evaluate the number of CNTs which span the gap by measuring the simultaneous variation of gap impedance during the DEP process. Sudden decreases of gap impedance signals were detected during the DEP assembly of multi-walled carbon nanotubes (MWNTs) corresponding to assembly of single or multiple tubes across the gap. The method reduces the requirement of scanning electron microscopy (SEM) inspection and could help automate DEP assembly of CNTs.

Keywords

nanostructurescanning electron microscopy (SEM)joining
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1057: Symposium II – Nanotubes and Related Nanostructures , 2007 , 1057-II17-03
Copyright
Copyright © Materials Research Society 2008

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