Web Release Date: October 1,
Estimation of Magnetic Susceptibility Anisotropy of Carbon Nanotubes Using Magnetophotoluminescence
and
Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, Department of Chemistry, Rice University, Houston, Texas 77005, and National High Magnetic Field Laboratory, Tallahassee, Florida 32310
Received August 28, 2004
Abstract:
We have carried out a magnetophotoluminescence excitation spectroscopy study on micelle-suspended single-walled carbon nanotubes in
high magnetic fields. By analyzing field-dependent spectral changes, we determined the degree of magnetic alignment of the observed
semiconducting nanotubes at 45 T. This, together with an independently measured length distribution of the nanotubes, allowed us to estimate
the magnitude of the magnetic susceptibility anisotropy 
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to be ~1.4 × 10-5 emu/mol for 1-nm-diameter semiconducting nanotubes.
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