We report the KrF excimer laser ablation of carbonaceous targets in an innovative laser ablation chamber. The targets have been prepared using a new approach, without pressing or hot pressing of the com position. The Co/Ni doped target has yielded single wall carbon nanotubes with a narrow diameter distribu tion. High resolution transmission electron microscopy has been used along with the confocal Raman microscopy to characterize the products obtained. Thermogravimetric analysis confirms the presence of multiple carbonaceous species with different oxidation temperatures.

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Carbon nanomaterials have been obtained using an innovative laser ablation chamber design. The chamber has several improvements of the design including a longer oven and a longer cold finger as compared to other designs. The laser employed in these experiments has been a KrF excimer laser. The chamber has been successfully used for obtaining nano-onions and single walled carbon nanotubes by laser ablation. A novel target preparation method has been developed and employed to incorporate metal catalysts without the need of pressing or hot pressing of the targets. The ablation products, obtained using this new chamber design, have been investigated by transmission electron microscopy and micro-Raman spectroscopy, as well as thermogravimetric analysis measurements.

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