title: Spin probe ESR studies of dynamics of single walled carbon nanotubes.
abstract: The highly sensitive technique of spin-probe Electron Spin Resonance (ESR) has been used to study dynamics of carbon nanotubes. The ESR signals were recorded for the nitroxide free radical TEMPO in carbon nanotubes from 5 to 300 K. The onset of the fast dynamics of the probe molecule was indicated by appearance of a narrow triplet at 230 K. The ESR measurements were also done on TEMPO in methanol for the comparative studies in the same temperature range, and in the latter observations, no change in spectra was seen around 230 K. The results indicate the occurrence of a change in the dynamics of carbon nanotubes around this temperature.
authors: Department of Physics, Indian Institute of Science, Bangalore, Karnataka, India.
authors: A K
authors: AK
authors: Dhami
authors: Shrivalli
authors: S
authors: Bhat
authors: Ajay
authors: A
authors: Sharma
authors: S V
authors: SV
authors: Bhat
mesh_terms: D003497:Cyclic N-Oxides / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy; D000432:Methanol / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013113:Spin Labels; D013696:Temperature
chemical_list: D003497:Cyclic N-Oxides; D037742:Nanotubes, Carbon; D013113:Spin Labels; C003959:TEMPO; D000432:Methanol