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Carbon nanotubes were treated by high-energy ball milling processing for different milling times, and the samples were observed by HRTEM. The broken nanotubes and lots of carbon onion-like particles were obtained in the sample milled for 15 min. When the milling time was up to 60 min, carbon nanotubes turned into amorphous carbon. On the basis of HRTEM observation of carbon nanotubes and carbon nanoparticles,...
The transitional model from carbon nanotube to diamond has been established. The transition has been accomplished from carbon nanotube to carbon onion and then to diamond through laser irradiation. The transition from tube to onion under laser irradiation experiences the process of structure collapse of the tube and re-organization of carbon clusters. Carbon atoms in onions have some sp 3 ...
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