2007 Fiscal Year Final Research Report Summary
Growth mechanism of metallofullerenes
| Project/Area Number |
18550022
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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 |
Physical chemistry
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
ACHIBA Yohji Tokyo Metropolitan University, Department of Chemistry, Professor (20002173)
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| Co-Investigator(Kenkyū-buntansha) |
SHIROMARU Haruo Tokyo Metropolitan University, Department of Chemistry, Associate Professor (70196632)
KODAMA Takeshi Tokyo Metropolitan University, Department of Chemistry, Assistant Professor (20285092)
SUZUKI Shinizo Kyoto Sangyo University, Deparment of Physics, Associate Professor (10226516)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Metallofullerenes / carbon nanostructure / fullerene / carbon nanotube / cap structure / metal encapsulation / fullerene network / precursor of nanostructure |
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| Research Abstract |
Fullerenes, metallofullerenes and carbon nanotubes have been known to consist of a curved carbon network with nano meter sizes. Among these carbon nanomaterials, fullerene and metallofullerenes consist of pentagons and hexagons, but carbon nanotubes consist of mostly only curved hexagons. Howeve4 looking at very carefully the tip of the carbon nanotubes, we see the presence of a fullerene cap structure consisting of 6 pentagons and hexagons. The numbers of hexagons for this caPP much depend of the sin of the diameter of carbon nanotubes i.e., the carbon nanotube with larger diameter has the larger diameter cap structure. One of the most important and common issues which has not been clarified yet is growth process of these nano carbon materials. In the present work we intended to clarify the mechanism of growth process by constructing a model which commonly describe the growth processes of these three kinds of carbon nano materials and to investigate the model on the basis of experimental evidences. For this purpose, we first made a model in which the formation of a fullerene cap structure consisting of 6 pentagons and hexagons commonly takes place at the initial growth stage. Then, the model has been examined by several kinds of experimental evidences such as characterization of carbon nano materials produced under the different experimental conditions. Experimental results clearly showed that the size of fullerene cap structure was significantly influenced by temperature under which the carbon nano structures grew up.
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[Journal Article] Resonance Raman study of polyynes encapsulated in single-wall carbon nanotubes2007
Author(s)
L. M. Malard, D. Nishide, L. G. Dias, R.B. Capaz, A. P. Gomes, A. Jorio, C. A. Achete, R. Saito, Y. Achiba, H. Shinohara, M. A. Pimenta
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Journal Title
Phys. Rev, B76
Pages: 233412-233416
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Photoemission and inverse photoemission study of the electronic structure of C60 fullerenes encapsulated in single-wall carbon nanotubes2006
Author(s)
H. Shiozawa, H. Ishi, H. Kihara, N. Nakamura, T. Yoshida, Y. Takayama, T. Miyahara, S. Suzuki, Y. Achiba, T. Kodama, M. Higashiguchi, X. Y. Chi, M. Nakatake, K. Shimada, H. Namatame, M. Taniguchi, H. Kataura
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Journal Title
Phys. Rev. B73
Pages: 075406-1-075406-5
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Delayed ionization of C762006
Author(s)
B. Concina, S. Tomita, N. Takahashi, T. Kodama, S. Suzuki, K. Kikuchi, Y. Achiba, A. Gromov, J. U. Andersen, P. Hvelplund
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Journal Title
Int. J. Mass Spectrometry 252
Pages: 96-99
Description
「研究成果報告書概要(欧文)」より
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