CIMAINA, Università degli Studi di Milano, V, ia Celoria 16, I-20133 Milano, Italy.
Abstract:
The presence and stability of sp hybridized atoms in free carbon nanoparticles was investigated by NEXAFS spectroscopy. The experiments show that a predominant fraction of carbon atoms is found in linear sp-chains and that conversion into sp(2) structures proceeds already at low temperature and in the gas phase.