Article

Journal of Low Temperature Physics

, Volume 159, Issue 1, pp 262-266

First online:

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

  • Nicolas UbrigAffiliated withLaboratoire National des Champs Magnétiques Intenses Email author 
  • , Jonah ShaverAffiliated withDepartment of Electrical and Computer Engineering, Rice University
  • , A. Nicholas G. Parra-VasquezAffiliated withDepartment of Chemical and Biomolecular Engineering, Rice University
  • , Matteo PasqualiAffiliated withDepartment of Chemical and Biomolecular Engineering, Rice University
  • , Junichiro KonoAffiliated withDepartment of Electrical and Computer Engineering, Rice University
  • , J. A. FaganAffiliated withNational Institute of Standards and Technology
  • , Oliver PortugallAffiliated withLaboratoire National des Champs Magnétiques Intenses

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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.

Carbon nanotubes Dichroism Pulsed magnetic fields