Dielectrophoresis Field Flow Fractionation of Single-Walled Carbon Nanotubes

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Abstract

We report a study on Dielectrophoresis Field Flow Fractionation of Single-Wall Carbon Nanotubes (SWNTs). SWNTs, individually suspended in 1% SDBS solution, were separated by type when they passed a dielectrophoresis field flow fractionation device where 1 MHz AC voltage was supplied and the field strength was well below 1 V per mum. Furthermore, we uniquely observed enrichment of semiconductive SWNTs based on their band gap. In addition to Raman spectrum, UV-vis absorption and NIR fluorescence spectra were used for solution samples for characterization.

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