Dielectrophoresis Field Flow Fractionation of Single-Walled Carbon Nanotubes

J. Am. Chem. Soc., 128 (26), 8396 -8397, 2006. 10.1021/ja0621501 S0002-7863(06)02150-0
Web Release Date: June 9, 2006

Dielectrophoresis Field Flow Fractionation of Single-Walled Carbon Nanotubes

Haiqing Peng, Noe T. Alvarez, Carter Kittrell, Robert H. Hauge, and Howard K. Schmidt*

Carbon Nanotechnology Laboratory, Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 South Main Street, Houston, Texas 77005

hks@rice.edu

Received April 7, 2006

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 m. 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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