2001 Fiscal Year Final Research Report Summary
EXTRACTION, SEPARATION OF EXOTIC CARBON CLUSTERS FROM FULLERENE SOOT AND ITS APPLICATION
| Project/Area Number |
11694119
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
TOHJI Kazuyuki Tohoku University, Graduate school of engineering, Professor, 大学院・工学研究科, 教授 (10175474)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Hideyuki Tohoku University, Institute for Materials Research, Research Associate, 金属材料研究所, 助手 (90312652)
SHINODA Kozo Tohoku University, Graduate school of engineering, Research Associate, 大学院・工学研究科, 助手 (10311549)
BALACHANDRAN Jeyadevan Tohoku University, Graduate school of engineering, Associate Professor, 大学院・工学研究科, 助教授 (80261593)
ITO Osamu Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Professor, 多元物質科学研究所, 教授 (30006332)
KASUYA Atsuo Tohoku University, Center for Interdisciplinary Research, Professor, 学際科学研究センター, 教授 (10005986)
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| Project Period (FY) |
1999 – 2001
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| Keywords | arc-discharge / small fullerene / cluster / C_<36> / C_<60> / hydrothermal process / fullerene oxide dimer / carbon nanotube |
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| Research Abstract |
The soot as products of arc-discharge using carbon rod electrodes contain the various carbon cluster materials extractable by organic solvents and unextractable due to strong interaction between these and remaining fullerene soot. The extractable carbon clusters are relatively stable. Therefore, it is concerned that the carbon clusters having interesting properties exist in the unextractable materials.
In this project, we had researched the synthesis conditions to obtain the soot containing large amount of exotic carbon clusters, the synthesis and the separation of the fullerene-oxide dimer or the small fullerenes, and the high-yield synthesis and the purification of the carbon nanotubes.
We found that the yield of carbon clusters was deeply related to the synthesis conditions such as pressure in the arc-discharge chamber, atmospheric gas, or magnetic field. In the study for synthesis of the fullerene-oxide dimer, we succeeded to establish the synthesis process of fullerene oxides, the dimerization process, and the purification and separation process. We also have made an attempt to synthesize small fullerene like a C_<36>, to extract and separate from the soot, and the dependence of the shape conditions in the chambers. In the study of the synthesis and the purification of carbon nanotubes, we studied the control of the state of arc-plasma in order to improve the yield of carbon nanotubes and to control the size of them. As a result, we found that the growth rate was depended on the density of carbon radical in arc plasma and it can be controlled by application of magnetic field.
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[Publications] B. Jeyadevan, Y. Sato, T. Nakano, K. Tohji, A. Kasuya, R. Hatakeyama, H. Ishida, N. Sato, K. Ueno and T. Takagi: "SWNTs Synthesized in External Magnetic Field"Conf. Proc., Nanonetwork Materials, American Institute of Physics. 590. 3-6 (2001)
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