Mechanical degradation of carbon nanotubes: ESR investigations

M. D. Chipara, A. Kukovecz, Z. Konya, J. M. Zaleski, M. Chipara

Research output: Chapter in Book/Report/Conference proceedingConference contribution


ESR investigations on milled multiwalled carbon nanotubes are reported. The ESR spectra of pristine and milled carbon nanotubes consists of two resonances, a wide line located at g > 3.0 assigned to magnetic particles (catalysts residues) and a broad line with a peak to peak linewidth of about 10 -2 T located at g = 2.05 and assigned to the interaction between the conducting electrons delocalized over carbon nanotubes and magnetic ions. It was observed that the parameters of this line (line position, linewidth, and line amplitude) depend on the milling time. For short milling times (up to 125 minutes) both the resonance linewidth and the g-factor increase as the milling time is increased. Longer milling times resulted in a decrease of both the g-factor and resonance linewidth (as the milling time was increased). This behavior was assigned to the removal of magnetic nanoparticles from carbon nanotubes. No resonance line due to the destruction of carbon nanotubes was observed.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Number of pages6
Publication statusPublished - May 8 2006
Event2005 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 1 2005

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2005 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Chipara, M. D., Kukovecz, A., Konya, Z., Zaleski, J. M., & Chipara, M. (2006). Mechanical degradation of carbon nanotubes: ESR investigations. In Materials Research Society Symposium Proceedings (pp. 21-26). (Materials Research Society Symposium Proceedings; Vol. 887).