Dielectrophoresis-induced separation of metallic and semiconducting SWNT in a continuous flow microfluidic system
Journal article, 2007

The AC dielectrophoresis-induced separation of metallic and semiconducting single-wall carbon nanotubes has been carried out in a continuous flow microfluidic system with isolated electrodes. The separation has been studied for single-wall carbon nanotube aqueous suspensions with ionic (sodium dodecylsulphate) and non-ionic (TritonX-100) surfactants. The efficiency of separation has been determined with the help of resonant Raman spectroscopy using various excitation energies. The prototype microfluidic cell presently shows somewhat inferior separation efficiency with respect to static dielectrophoretic filtering on arrays of microelectrodes but has potential for improvements. Factors influencing the separation efficiency and scaling up of the process are discussed.

carbon nanotube separation


M Mattsson

University of Gothenburg

Andrei Gromov

University of Gothenburg

Staffan Dittmer

Chalmers, Applied Physics

Emma Eriksson

University of Gothenburg

Oleg Nerushev

University of Gothenburg

Eleanor E B Campbell

University of Gothenburg

Journal of Nanoscience and Nanotechnology

1533-4880 (ISSN)

Vol. 7 3431-3435

Subject Categories

Atom and Molecular Physics and Optics



More information