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Updated: May 27, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Dielectrophoresis field flow fractionation of single-walled carbon nanotubes
Haiqing Peng1, Noe T Alvarez, Carter Kittrell
1Carbon Nanotechnology Laboratory, Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 South Main Street, Houston, TX 77005, USA.
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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