Dielectrophoresis-induced separation of metallic and semiconducting single-wall carbon nanotubes in a continuous flow microfluidic system

Mattias Mattsson, Andrei Gromov, Staffan Dittmer, Emma Eriksson, Oleg A. Nerushev, Eleanor E. B. Campbell

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)3431-3435
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number10
DOIs
Publication statusPublished - Oct 2007

Keywords

  • single-wall carbon nanotubes
  • microfluidics
  • semiconducting
  • separation
  • ELECTRICAL-TRANSPORT
  • ELECTRONIC-STRUCTURE
  • RAMAN-SCATTERING
  • FUNCTIONALIZATION
  • DIAMETER
  • MODES

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