Nanotech 2006 Vol. 1
Nanotech 2006 Vol. 1
Technical Proceedings of the 2006 NSTI Nanotechnology Conference and Trade Show, Volume 1

Carbon Nanotubes Chapter 2

Determination of relative concentrations of metallic and semi-conducting SWNTs in suspension via dielectrophoresis

Authors: N. Mureau, E. Mendoza, K.F. Hoettges, S.R.P. Silva and M.P. Hughes

Affilation: University of Surrey, United Kingdom

Pages: 110 - 112

Keywords: dielectrophoresis, chirality, characterisation, impedance

Dielectrophoresis (DEP) is a phemomenon of induced particle motion in non-uniform electric fields. The effect is frequency dependent; by monitoring the motion of particles in AC fields and ananlysing the change in motion with frequency, it is possible to determine the electrical properties of nanoparticles in lab-on-a-chip systems. In this paper, we demonstrate how DEP can be used to determine the ratio of semiconducting and metallic carbon nanotubes in solution, by monitoring the frequency-dependent impedance change between two electrodes as a function of energising frequency.

ISBN: 0-9767985-6-5
Pages: 871
Hardcopy: $119.95

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