2002 Fiscal Year Final Research Report Summary
A creation of cryogenic electron emission microscope and the applications to solid surfaces.
| Project/Area Number |
11354003
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
固体物性Ⅰ(光物性・半導体・誘電体)
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| Research Institution | The University of Tokyo |
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Principal Investigator |
MASUDA Shigeru The University of Tokyo, Graduate School of Arts and Sciences, Associate professor, 大学院・総合文化研究科, 助教授 (50173745)
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| Co-Investigator(Kenkyū-buntansha) |
SAKAI Yuji JEOL Ltd., Electron Optics Division, Group leader, 電子光学機器技術本部, グループ長(研究職)
AOKI Masaru The University of Tokyo, Graduate School of Arts and Sciences, Research associate, 大学院・総合文化研究科, 助手 (50302823)
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| Project Period (FY) |
1999 – 2002
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| Keywords | electron emission microscope / electron spectroscopy / electronic state / metastable atom / solid surface |
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| Research Abstract |
A new electron emission microscope using photons, low-energy electrons, and metastable atoms as an excitation source has been developed to study spatiotemporal phenomena occurring at a solid surface. The metastable atoms such as He*(2^3S) were produced by cold-discharge and the beam intensity was attained to 〜10^16 He(2^3S) atoms s^<-1> sr^<-1>. The electrostatic and magnetic lens systems were designed at our laboratory for the low-energy electron gun and electron emission microscope based on a computer simulation program. The spatial resolution of the microscope thus constructed is 100 nm at present and will be improved by beam adjustment. We also developed a sample cooling system from some K to 1000 K to observe images of samples held at low temperature. Further we have observed PEEM images of stoichiometric NiO and chemisorbed oxygen during heating of the oxygen-exposed Ni(100), indicating that the desorption of the oxide layer proceeds inhomogeneously in space.
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