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- Kang, Joo H.
- Translational Multiscale Biofluidics Lab.
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Magnetophoretic continuous purification of single-walled carbon nanotubes from catalytic impurities in a microfluidic device
- Author(s)
- Kang, Joo H., Park, Je-Kyun
- Issued Date
- 2007-10
- Citation
- SMALL, v.3, no.10, pp.1784 - 1791
- Abstract
- A magnetophoretic continuous purification method is presented of single-walled carbon nanotubes (SWCNTs) from the superparamagnetic iron-catalyst impurities in a microfluidic device without any influence on inherent SWCNT properties. By employing microfluidics and a magnetic-field-induced saw-tooth nickel microstructure, a highly enhanced magnetic force in adjoining microchannels is exploited. The iron impurities of SWCNTs are attracted towards areas of higher magnetic-flux density in the microchannels where magnetic field was asymmetrically generated perpendicularly to the streamline. We obtained highly purified SWCNTs at a rate of 0.36 mgh(-1) and that are estimated to be about 99 % purity.
- Publisher
- WILEY-V C H VERLAG GMBH
- ISSN
- 1613-6810
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