Effect of a square wave on an assembly of multi-walled carbon nanotubes using AC dielectrophoresis

Hyung Cheoul Shim, Yoon Keun Kwak, Chang Soo Han, Soohyun Kim

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Here, we report an alignment and attachment of multi-walled carbon nanotubes (MWNTs) between microelectrodes using alternating current (AC) dielectrophoresis, where the AC dielectrophoresis is induced by a square wave rather than the conventional sinusoidal wave. A parametric study showed that square-wave-based AC dielectrophoresis is useful in alignment and attachment of MWNTs on a microelectrode gap, and that the square wave is effective in aligning the MWNTs in a low-frequency range (∼10 kHz) without addition of a direct current (DC) signal. Moreover, we could attach the MWNTs between microelectrodes with minimal amounts of impurities by adjusting the square-wave duty cycle.

Original languageEnglish
Pages (from-to)1137-1142
Number of pages6
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number7
Publication statusPublished - 2009 Jun
Externally publishedYes

Bibliographical note

Funding Information:
We acknowledge the financial support from the Center for Nanoscale Mechatronics & Manufacturing of the 21C Frontier Research Program. And this work was also partially supported by the second stage of the Brain Korea 21 Project in 2008.

Copyright 2009 Elsevier B.V., All rights reserved.


  • Dielectrophoresis
  • Multi-walled carbon nanotubes (MWNTs)
  • Square wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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