2007 Fiscal Year Final Research Report Summary
Edge Sites of Cup-stacked Type Carbon Nanotube Studied by Positron Annihilation Spectroscopy and Electron Microscopy
| Project/Area Number |
18560651
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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 |
Inorganic materials/Physical properties
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| Research Institution | Tokyo Gakugei University |
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Principal Investigator |
MURAKAMI Hideoki Tokyo Gakugei University, Emeritus Professor (30011000)
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| Co-Investigator(Kenkyū-buntansha) |
KANAZAWA Ikuzo Tokyo Gakugei University, Faculty of Education, Professor (00134768)
SATO Kiminori Tokyo Gakugei University, Faculty of Education, Associate Professor (00401448)
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| Project Period (FY) |
2006 – 2007
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| Keywords | cup-stacked carbon nanotube / edge site of graphene sheet / positronium formation / coincidence Doppler broadening / positron lifetime / observation by high resolution electron microscopy |
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| Research Abstract |
It was demonstrated by positron-lifetime spectroscopy that positronium atoms are formed in cup-stacked carbon nanotubes (CNTs) but they are not found in multi-walled carbon nanotubes (MNTs). The difference is explained in terms of positron annihilation on zigzag surfaces of CNTs, which are composed of both graphene-sheet and graphite-edge planes, by coincidence Doppler broadening spectroscopy.
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