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Dynamic Alignment of Single-Walled Carbon Nanotubes in Pulsed Magnetic Fields

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Abstract

We have used linear dichroism spectroscopy to measure the dynamic alignment of single-walled carbon nanotubes (SWNT) in pulsed magnetic fields up to 55 T. We make use of the fact that SWNTs absorb light only when the electric-field vector is oriented parallel to the tube axis. SWNTs thus produce a polarization dependent change of the optical transmission, that permits precise measurements of their orientation. In order to distinguish the influence of different mechanisms governing the alignment such as the external magnetic field, Brownian motion or the tube length, we have systematically varied parameters such as the viscosity of the aqueous solution and the sample temperature.

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Authors and Affiliations

  1. Laboratoire National des Champs Magnétiques Intenses, 31400, Toulouse, France

    Nicolas Ubrig & Oliver Portugall

  2. Department of Electrical and Computer Engineering, Rice University, Houston, TX, 77005, USA

    Jonah Shaver & Junichiro Kono

  3. Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, 77005, USA

    A. Nicholas G. Parra-Vasquez & Matteo Pasquali

  4. National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA

    J. A. Fagan

Authors
  1. Nicolas Ubrig
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  2. Jonah Shaver
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  3. A. Nicholas G. Parra-Vasquez
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  4. Matteo Pasquali
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  5. Junichiro Kono
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  6. J. A. Fagan
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  7. Oliver Portugall
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Corresponding author

Correspondence to Nicolas Ubrig.

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Ubrig, N., Shaver, J., Parra-Vasquez, A.N.G. et al. Dynamic Alignment of Single-Walled Carbon Nanotubes in Pulsed Magnetic Fields. J Low Temp Phys 159, 262–266 (2010). https://doi.org/10.1007/s10909-009-0112-8

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  • DOI: https://doi.org/10.1007/s10909-009-0112-8

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