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

15 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


  • 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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