Shaping nanoelectrodes for high-precision dielectrophoretic assembly of carbon nanotubes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Didi Xu
  • Arunkumar Subramanian
  • Lixin Dong
  • Bradley J. Nelson

Detail(s)

Original languageEnglish
Article number4785234
Pages (from-to)449-456
Journal / PublicationIEEE Transactions on Nanotechnology
Volume8
Issue number4
Online published18 Feb 2009
Publication statusPublished - Jul 2009
Externally publishedYes

Abstract

To achieve high-precision dielectrophoretic (DEP) assembly of carbon nanotubes (CNTs) for nanoelectronic circuits and nanoelectromechanical systems (NEMS), a technique is investigated both theoretically and experimentally for shaping the local geometries of nanoelectrodes to control the electrohydrodynamic behavior of CNTs. Motion trajectories and positions of CNTs assembled on electrodes are predicted based on calculated DEP forces and torques. Both simulation and experimental results show that the geometries of two opposing electrodes significantly affect the precision and robustness with which CNTs can be deposited. Experimental investigation of an electrode array demonstrates that the spacing between neighboring electrode pairs should be larger than twice the width of electrodes to avoid overlapping electric fields and unstable DEP forces; otherwise, unequally distributed electric fields and DEP forces induce a significant number of assembly failures in the array.

Research Area(s)

  • Assembly, Carbon nanotube, Dielectrophoresis, Electric field, Geometry

Citation Format(s)

Shaping nanoelectrodes for high-precision dielectrophoretic assembly of carbon nanotubes. / Xu, Didi; Subramanian, Arunkumar; Dong, Lixin; Nelson, Bradley J.

In: IEEE Transactions on Nanotechnology, Vol. 8, No. 4, 4785234, 07.2009, p. 449-456.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review