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Electron spin resonance spectroscopy investigations of carbon nanotubes – epoxy composites

M. CHIPARA1,* , F. IACOMI2, J. M. ZALESKI1, J. B. BAI3

Affiliation

  1. Indiana University, Bloomington, IN 47408, USA
  2. Al. I. Cuza University, Iasi, Romania
  3. Lab. MSS-MAT, CNRS UMR 8579, Ecole Centrale de Paris, Grande Voie des Vignes, Chatenay Malabry CEDEX 92295, France

Abstract

Electron spin resonance investigations on carbon nanotubes-epoxy composites containing 1%, 2%, and 3% multiwalled nanotubes with a length of 10 µm are reported. The observed resonance spectrum is dominated by a strong line with a peak to peak width of about 14 Gauss, located at g=2.023, and characterized by a negligible asymmetry. It was found that the resonance line position (g factor), resonance line width, and double integral of the resonance line are essentially temperature independent in the range 150 K – 250 K. This resonance line was assigned to uncoupled electronic spins delocalized over carbon nanotubes..

Keywords

Electron spin resonance (ESR), Carbon nanotubes, Composites, Line width, g factor, Susceptibility, Temperature dependence.

Submitted at: Jan. 23, 2006
Accepted at: March 23, 2006

Citation

M. CHIPARA, F. IACOMI, J. M. ZALESKI, J. B. BAI, Electron spin resonance spectroscopy investigations of carbon nanotubes – epoxy composites, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 820-824 (2006)