| Project/Area Number |
03453014
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
物理化学一般
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
ACHIBA Yohji Tokyo Metropolitan Univ. Dept. of Chem. Associate Prof., 理学部, 助教授 (20002173)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Sinzo Tokyo Metropolitan Univ. Dept. of Chem. Research associate, 理学部, 助手 (10226516)
SHIROMARU Haruo Tokyo Metropolitan Univ. Dept. of Chem. Research Associate, 理学部, 助手 (70196632)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1992: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥4,900,000 (Direct Cost: ¥4,900,000)
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| Keywords | carbon cluster / solid surface / collision / electron emission / negative ion / fullerene / isomer / RHEED / RHEED / 半導体クラスタ- / レ-ザ-蒸発法 / 飛行時間型質量分析 / 電子分光 / フラ-レン |
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| Research Abstract |
Size selected semiconductor cluster ions were examined on the collisional electron emission at solid surface as a function of incident kinetic energy. Two different mechanisms were found below 1 keV collision energy. Electron emission occurring at high energy (>300 ev) is totally governed by velocity of the incident cluster ions. The electron emission at low collision energy, on the other hand, is considerably dependent on the molecular structures of the carbon clusters, i. e., linear chain, monocyclic ring, and hollowclosed-cage structures. The latter process is a new phenomenon which may be closely related with a collisional electron detachment of negative carbon cluster ions.
Then, carbon cluster containing from two to 60 atoms were examined in detail on the collision with the solid surface. Since the detachment efficiency significantly depends on the structure of clusters, versatile information of the unknown structures of carbon clusters may be obtained. Actually, we deduced from the present study, the structure of C_<60> produced by laser vaporization should not be hollowclosed-cage.
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