2001 Fiscal Year Final Research Report Summary
Formation Process of Carbon Nanoparticles - Covelation with the Formation Process of Fullerenes and Signal - Walled Carbon Nanotub
| Project/Area Number |
12640561
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
機能・物性・材料
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
SUZUKI Shinzo Graduate School of Science,Tokyo Metropolitan University Research Associate, 理学(系)研究科(研究院), 助手 (10226516)
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| Project Period (FY) |
2000 – 2001
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| Keywords | fullerene / single-walled carbon nanotube / formation process / nanoparticle |
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| Research Abstract |
It is important to investigate the role of carbon and metal nanoparticles in the formation process of fullerenes and single-walled carbon nanotubes. Experimantal findings obtained in this project by use of a laser furnace apparatus combind with a high-speed video camera are in the following.
1) It is clarified that the time scale of the main formation process of fullerenes is ca. 1 msec. Also, in addition to the increase in the blackbody emission intensity, the formation of C_2 in the same time domain was found. Based on these experimental findings, a model for the formation of fullerenes was proposed, where firstly, small-sized carbon clusters are combined to grow, secondly cooled down by blackbody emission and C_2 elimination, and finally take a form of round structure.
2) The formation of single-walled carbon nanotubes under different kinds of ambient gas, gas pressure, and gas velocity in the formation field was extensively investigated. The results show that, though the yield of single-walled carbon nanotubes does not depend so much on the kind of ambient rare gas such as Ne, Ar and Kr, nitrogen gas (N_2) gives the highest yield for single-walled carbon nanotube formation. Additionally, it was found that single-walled carbon nanotubes could be generated by mixing metal nanoparticles with carbon nanoparticles after laser vaporization. This indicates that metal nanoparticles contribute to the growth process of single-walled carbon nanotubes, ca. 1 msec after laser vaporization.
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Research Products
(12 results)
