ELECTRON-SPIN-RESONANCE OF CARBON NANOTUBES

The electron spin resonance (ESR) of carbon nanotubes at various stage s of purification have been measured between 4 and 296 K. The conducti on electron spin resonance is identified and the results imply that me tallic and/or narrow PP semiconducting nanotubes are actually present as predicted by theory. From the temperature dependences of the ESR in tensity, linewidth and g-value, the electronic properties of the obser ved nanotubes are found to be similar to those of graphite.