Electrical polarizability of carbon nanotubes in liquid suspension

Electrical polarizability of carbon nanotubes in liquid suspension

The alignment and polarizability of single-wall carbon nanotubes in dilute ethanol suspensions under low-frequency, alternating-current electric fields were investigated through optical polarimetry. The nematic order parameter was determined by measuring changes in the state of polarization of a las...

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Veröffentlicht in:Applied physics letters 2007-05, Vol.90 (20), p.203108-203108-3
Hauptverfasser: Brown, Matthew S., Shan, Jerry W., Lin, Chen, Zimmermann, Frank M.
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creator Brown, Matthew S.
Shan, Jerry W.
Lin, Chen
Zimmermann, Frank M.
description The alignment and polarizability of single-wall carbon nanotubes in dilute ethanol suspensions under low-frequency, alternating-current electric fields were investigated through optical polarimetry. The nematic order parameter was determined by measuring changes in the state of polarization of a laser beam transmitted through the sample. The dependence of the measured alignment on the electric field was found to be consistent with a thermal-equilibrium distribution of freely rotating, polarizable rods. The polarizability determined by fitting to this model is consistent with the classical result for a conducting ellipsoid of the dimensions of the nanotubes.
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title Electrical polarizability of carbon nanotubes in liquid suspension
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