Journal of Low Temperature Physics

, Volume 159, Issue 1–2, pp 262–266 | Cite as

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

  • Nicolas Ubrig
  • Jonah Shaver
  • A. Nicholas G. Parra-Vasquez
  • Matteo Pasquali
  • Junichiro Kono
  • J. A. Fagan
  • Oliver Portugall
Article

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.

Carbon nanotubes Dichroism Pulsed magnetic fields 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Nicolas Ubrig
    • 1
  • Jonah Shaver
    • 2
  • A. Nicholas G. Parra-Vasquez
    • 3
  • Matteo Pasquali
    • 3
  • Junichiro Kono
    • 2
  • J. A. Fagan
    • 4
  • Oliver Portugall
    • 1
  1. 1.Laboratoire National des Champs Magnétiques IntensesToulouseFrance
  2. 2.Department of Electrical and Computer EngineeringRice UniversityHoustonUSA
  3. 3.Department of Chemical and Biomolecular EngineeringRice UniversityHoustonUSA
  4. 4.National Institute of Standards and TechnologyGaithersburgUSA

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