title: Dielectrophoresis-induced separation of metallic and semiconducting single-wall carbon nanotubes in a continuous flow microfluidic system.
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.
authors.affiliation: Department of Physics, Gothenburg University, 412 96 Göteborg, Sweden.
authors.forename: Mattias
authors.initials: M
authors.lastname: Mattsson
authors.forename: Andrei
authors.initials: A
authors.lastname: Gromov
authors.forename: Staffan
authors.initials: S
authors.lastname: Dittmer
authors.forename: Emma
authors.initials: E
authors.lastname: Eriksson
authors.forename: Oleg A
authors.initials: OA
authors.lastname: Nerushev
authors.forename: Eleanor E B
authors.initials: EE
authors.lastname: Campbell
mesh_terms: D003460:Crystallization / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D004586:Electrophoresis / Q000295:instrumentation / Q000379:methods*; D008670:Metals; D044085:Microfluidics / Q000295:instrumentation / Q000379:methods*; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012666:Semiconductors
chemical_list: D008670:Metals; D037742:Nanotubes, Carbon