ESR studies of gas adsorption on carbon nanotubes

Abstract

The effect of gas adsorption on different carbon nanotube systems is studied using ESR spectrosocpy. One system consists of purified and unpurified single-walled carbon nanotubes, one of unpurified multiwalled tubes, and one of multi-walled tubes where defects have been introduced purposefully at different levels. In single- and multi-walled tubes, hydrogen adsorbs preferentially on defects. Electron-donating ammonia seems to affect the interlayer interaction in multi-walled carbon nanotubes. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA.