2007 Fiscal Year Final Research Report Summary
DEVELOPMENT OF A NEW TECHNIQUE FOR MEASURING CHEMICAL FORM OF ELEMENTS IN NANOSCOPIC REGION USING PARTICLE BEAM ANALYSIS
| Project/Area Number |
18360450
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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 |
Nuclear engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
YAMAZAKI Hiromichi Tohoku University, Cyclotron Radioisotope Center, Professor (00166654)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUYAMA Shigeo Graduate School of Engineering, 大学院・工学研究科, Associate Professor (70219525)
KIKUCHI Yohei Graduate School of Engineering, 大学院・工学研究科, Assistant Professor (50359535)
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| Project Period (FY) |
2006 – 2007
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| Keywords | nanobeam / PIXE / RBS / off-axis STIM / Chemical Form Analysis |
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| Research Abstract |
In this study, a nanobeam system has been developed for chemical state elemental analysis in samples under various environmental and biochemical conditions in the nanoscopic region. Combination of PIXE, RBS and off-axis STIM methods enabled simultaneous analysis for hydrogen to metal elements and revealed the chemical composition of the elements contained in the sample.
In order to improve the microbeam performance and decrease the beam spot size down to several tens nm with higher beam current, the terminal equipments and an acceleration tube of the Dynamitron accelerator were upgraded. The microbeam system was also improved. Parasitic field contamination from tungsten carbide slit chips and an annular Si surface barrier detector limited the beam spot size to 2×2μm^2. By replacing these components, the parasitic field contamination of the system was reduced and the performance of the microbeam system was remarkably improved. A measured beam spot size of 0.4×0.4μm^2 at a beam current of
… More
several tens of pA has been accomplished. The results obtained using the grid-shadow method show that a beam spot size of less than 0.4μm is obtainable in the low-current regime.
The nanobeam system was applied to analysis of yellow sand dust particles. The major elements of yellow sand dust particles are silicon, calcium, oxygen, carbon, and hydrogen, and exist in the form of oxide or carbonate. The ternary diagram of aluminum, silicon, and calcium shows the difference of the soil components of the Asian continent and Japanese islands. The correlation of calcium and chlorine is different for each Kosa event depending on the difference of transport to the Japanese islands. Yellow sand dust particles contain more sulfur and heavier elements such as manganese and zinc. These particles were transported from the Asian continent over industrial areas to Japan and might adsorb these elements by mixing with anthropogenic aerosols. These results were obtained by analyzing single aerosol particles and were not obtained using bulk analysis, which averages measurements over many particles. Single particle analysis of yellow sand dust will engender a better understanding of their formation process during transport.
The nonobeam system was also applied to characterization of steel corrosion. Thickness and elemental distribution of corrosion layer could be determined in the nanoscopic region. Corrosion progresses remarkably in the case of steels containing Cr less than 0.1wt%. Less
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Research Products
(28 results)
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[Journal Article] In-vivo Elemental Analysis by PIXE-μ-CT2007
Author(s)
Y. Kawamura, K. Ishii, H. Yamazaki, S. Matsuyama, Y. Kikuchi, T. Yamaguchi, Y. Watanabe, R. Oyama, G Momose, A. Ishizaki, S. Tsuboi, K. Yamanaka and M. Watanabe
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Journal Title
International Journal of PIXE vol. 17 Nos1&2
Pages: 41-46
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] DEVELOPMENT OF MICROBEAM SCANNING SYSTEM2007
Author(s)
R. Oyama, S. Matsuyama, K. Ishii, H. Yamazaki, Y. Kikuchi, K. Inomata, Y. Watanabe, A. Ishizaki, Y. Kawamura, T. Yamaguchi, G. Momose
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Journal Title
International Journal of PIXE Vol. 17 1&2
Pages: 77-84
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Progress and application of the Tohoku microbeam system2007
Author(s)
S. Matsuyama, K. Ishii, H. Yamazaki, Y. Kikuchi, K. Inomata, Y. Watanabe, A. Ishizaki, R. Oyama, Y. Kawamura, T. Yamaguchi, G. Momose, M. Nagakura, M. Takahashi, T. Kamiya
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Journal Title
Nuclear Instruments and Methods in Physics Research Section B260
Pages: 55-64
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] 3D-imaging using micro-PIXE2007
Author(s)
K.Ishii, S. Matsuyama, Y. Watanabe, Y. Kawamura, T. Yamaguchi, R. Oyama, G Momose, A. Ishizaki, H. Yamazaki and Y. Kikuchi
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Journal Title
Nuclear Instruments and Methods in Physics Research Section A571
Pages: 64-68
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] DEVELOPMENT OF AN IN-AIR ON/OFF AXIS STIM SYSTEM FOR QUANTITATIVE ELEMENTAL MAPPING2006
Author(s)
K. Inomata, K. Ishii, H. Yamazaki, S. Matsuyama, Y. Kikuchi, Y. Watanabe, A. Ishizaki, R. Oyama, Y. Kawamura, T. Yamaguchi, G Momose, E. Sakurai, K. Yanai, T. Kamiya, T. Sakai, T. Satoh, M. Oikawa, K. Arakawa
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Journal Title
International Journal of PIXE Vol. 16 Nos. 3&4
Pages: 149-156
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Development of 3D micron-CT using PIXE2007
Author(s)
Y.Kawamura, K .Ishii, H .Yamazaki, S. Matsuyama, Y. Kikuchi, T. Yamaguchi, Y. Watanabe, R.Oyama, GMomose and A. Ishizaki
Organizer
XI International Conference on Particle Induced X-ray Emission and Its Analytical Application
Place of Presentation
Puebla, Mexico
Year and Date
20070525-29
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Elemental Mapping of plants using submilli-PIXE camera2007
Author(s)
Y.Kawamura, K .Ishii, H .Yamazaki, S. Matsuyama, Y. Kikuchi, T. Yamaguchi, Y. Watanabe, R.Oyama, GMomose and A. Ishizaki
Organizer
XI International Conference on Particle Induced X-ray Emission and Its Analytical Application
Place of Presentation
Puebal, Mexico
Year and Date
20070525-29
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Micronbeam analysis of yellow sand dust particles2007
Author(s)
S. Matsuyama, K. Ishii, H. Yamazaki, Y. Kikuchi, Y. Kawamura, R. Oyama, T. Yamamoto, A. Ishizaki and GMomose
Organizer
XI International Conference on Particle Induced X-ray Emission and Its Analytical Application
Place of Presentation
Puebla Mexico
Year and Date
20070525-29
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Improved radiosensitive liquid core microcapsules for the target of chemotherapeutic agents2007
Author(s)
S. Haradat, S. Ehara, K. Ishii, H. Yamazaki, S. Matsuyama, T. Sato, S. Oikawa, T. Kamiya, K. AraKawa, K. Sera, J. Ito
Organizer
XI International Conference on Particle Induced X-ray Emission and Its Analytical Application
Place of Presentation
Puebla Mexico
Year and Date
20070525-29
Description
「研究成果報告書概要(欧文)」より
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