Microfluidics and Nanofluidics

, 7:633

Dielectrophoretic separation of carbon nanotubes and polystyrene microparticles

  • C. Zhang
  • K. Khoshmanesh
  • F. J. Tovar-Lopez
  • A. Mitchell
  • W. Wlodarski
  • K. Klantar-zadeh
Research Paper

DOI: 10.1007/s10404-009-0419-4

Cite this article as:
Zhang, C., Khoshmanesh, K., Tovar-Lopez, F.J. et al. Microfluid Nanofluid (2009) 7: 633. doi:10.1007/s10404-009-0419-4

Abstract

The separation of multi-walled carbon nanotubes (MWCNTs) and polystyrene microparticles using a dielectrophoresis (DEP) system is presented. The DEP system consists of arrays of parallel microelectrodes patterned on a glass substrate. The performance of the system is evaluated by means of numerical simulations. The MWCNTs demonstrate a positive DEP behaviour and can be trapped at the regions of high electric field. However, the polystyrene microparticles demonstrate a negative DEP behaviour at a certain range of frequencies and migrate to the regions of low electric field. Experiments are performed on the microparticles at the frequencies between 100 Hz and 1 MHz to estimate their crossover frequency and select the range of separation frequencies. Further, experiments are conducted at the obtained range of separation frequencies to separate the MWCNTs and polystyrene microparticles.

Keywords

Dielectrophoresis Particle separation Carbon nanotube Polystyrene microparticle 

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • C. Zhang
    • 1
  • K. Khoshmanesh
    • 2
  • F. J. Tovar-Lopez
    • 1
  • A. Mitchell
    • 1
  • W. Wlodarski
    • 1
  • K. Klantar-zadeh
    • 1
  1. 1.School of Electrical and Computer EngineeringRMIT UniversityMelbourneAustralia
  2. 2.School of Engineering and ITDeakin UniversityGeelongAustralia