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In situ and real time determination of metallic and semiconducting single-walled carbon nanotubes in suspension via dielectrophoresis

Mureau, N, Mendoza, E, Silva, SRP, Hoettges, KF and Hughes, MP (2006) In situ and real time determination of metallic and semiconducting single-walled carbon nanotubes in suspension via dielectrophoresis APPLIED PHYSICS LETTERS, 88 (24). ? - ?. ISSN 0003-6951

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Abstract

We report an alternative method combining dielectrophoresis and impedance spectroscopy to provide rapid, accurate measurement of dielectrophoretic collection of single-walled carbon nanotubes (SWNTs) in real time. We analyzed a Triton X-100 suspension of mixed SWNTs to measure their precise dielectrophoretic collection behavior. Results indicate that our sample contains 21.5% of metallic and 78.5% of semiconducting carbon nanotubes before separation, and that the range of 1-15 MHz is ideal to collect only the metallic ones. Optical absorption was used to confirm these proportions. We discuss the possible errors associated with using purely a Raman technique to validate the type of SWNTs collected in suspension.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Applied, Physics, SEPARATION, EXTRACTION, PARTICLES, RAMAN
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:05
Last Modified: 23 Sep 2013 18:25
URI: http://epubs.surrey.ac.uk/id/eprint/3

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