Carbon nanotubular structures synthesis by means of ultraviolet laser ablation

N. Braidy; M.A. El Khakani; G. A. Botton

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Carbon nanotubular structures synthesis by means of ultraviolet laser ablation

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We report on the synthesis of carbon nanotubular structures produced for the first time by means of pulsed KrF laser ablation of a graphite pellet at high temperature (1150 deg C), under high argon gas pressure (500 torr), and at relatively high ultraviolet (UV) laser intensities (8 X 10~8 W/cm~2). The carbon nanotubular structures were directly observed by transmission electron microscopy and characterized by micro-Raman spectroscopy. Nanohorns (approx 2.5 nm diameter and approx 10 um long), a few single-wall nanotubes (1.2 to 1.5 nm diameter), and other nanotubular structures (such as graphitic nanocages and low-aspect-ratio nanotubules) were clearly observed in the carbon deposit. Raman spectra in the low-frequency range confirmed a population of tubular structures with diameters ranging from 0.7 to 2.0 nm. It is shown that the relatively high UV laser intensity used here favors the growth of various nanotubular structures to the detriment of single-wall nanotubes.

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《Journal of Materials Research》 |2002年第9期|2189-2192|共4页
作者
N. Braidy; M.A. El Khakani; G. A. Botton;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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正文语种英语
中图分类工程材料学;
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Carbon nanotubular structures synthesis by means of ultraviolet laser ablation

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