2004 Fiscal Year Final Research Report Summary
Nature and structure of sub-nanometer defects in metal oxides by complex electron spectro-microscopy
| Project/Area Number |
14350340
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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 |
Physical properties of metals
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| Research Institution | Nagoya University |
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Principal Investigator |
MUTO Shunsuke Nagoya University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (20209985)
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| Co-Investigator(Kenkyū-buntansha) |
TANABE Tetsuo Nagoya University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (00029331)
YOSHIDA Tomoko Nagoya University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (90283415)
TATSUMI Kazuyoshi Nagoya University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (00372532)
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| Project Period (FY) |
2002 – 2004
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| Keywords | transmission electron microscopy / electron energy loss spectroscopy / wavelength-dispersive x-ray analysis / cathodoluminescence / defect clusters / first-principle electronic state calculation / light elements analysis / metal oxides |
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| Research Abstract |
This project aims to develop a complex electron spectroscope TEM for exploring the electronic structures of solids and to apply it to characterize defect dusters consisting of a few to hundreds atoms in metal oxides and ceramic materials. As results we obtained the following achievements :
1.Instrumental development
1.1 Development of a new TEM specimen holder for detecting cathodoluminescence
1.2 Development of wavelength dispersive x-ray analysis spectrometer with grazing incidence configuraion
1.3 Equipment with hollow-cone illumination system in TEM
2.Development of new analytsis methods for electron spectroscopy
2.1 Advanced analysis of extended energy loss fine structure (Reverse Monte Carlo analysis, time-resolved measurements, introduction of wavelet transformation)
2.2 Extraction of medium range order of disordered structures by fluctuation electron microscopy
2.3 Theoretical simulations of energy loss near edge structure by first principle quantum chemistry calculations
2.4 Development of combined method of nanoindentation and finite element method for measuring mechanical properties of ceramics under irradiation
3.Applications
3.1 Detection of very small defect clusters and structural analysis of impurity oxygen defect complex
3.2 Characterization of gas ion irradiation induced blisters on ceramics surfaces
3.3 Analysis of hydrogen in hydrogenated nanostructured graphite
3.4 Analysis of electronic structures of promoter ceramic in catalysis for purifying automotive gas emission
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Research Products
(25 results)
