DEVELOPMENT OF A NEW TECHNIQUE FOR MEASURING CHEMICAL FORM OF ELEMENTS IN NANOSCOPIC REGION USING PARTICLE BEAM ANALYSIS

开发利用粒子束分析测量纳米区域元素化学形态的新技术

• 批准号: 18360450
• 负责人: YAMAZAKI Hiromichi
• 金额: $ 7.95万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360450/
• 关键词: nanobeam; PIXE; RBS; off-axis STIM; Chemical Form Analysis; 荷電粒子励起X線分光法(PIXE); ラザフォード後方散乱法(RBS)-; 透過イオン分光法(STIM); 黄砂; イオンビーム分析; 化学形態

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

在这项研究中，纳米束系统已被开发用于在各种环境和生物化学条件下在纳米区域的样品中的化学状态元素分析。结合PIXE、RBS和离轴STIM方法，可以同时分析氢和金属元素，并揭示样品中所含元素的化学组成。为了提高微束性能，在更高的束流下将束斑尺寸减小到几十nm，对Dynamitron加速器的终端设备和加速管进行了升级。对微束系统进行了改进。来自碳化钨狭缝芯片和环形硅表面势垒探测器的寄生场污染将束斑尺寸限制在2×2μm^2。通过更换这些元件，降低了系统的寄生场污染，显著提高了微束系统的性能。在束流为 ...更多信息 已经实现了几十pA。采用栅影法测量结果表明，在低电流区，束斑尺寸小于0.4μm。黄沙颗粒的主要元素是硅、钙、氧、碳和氢，以氧化物或碳酸盐的形式存在。铝、硅、钙三元相图显示了亚洲大陆和日本岛屿土壤成分的差异。钙和氯的相关性是不同的每次高砂事件取决于不同的运输到日本岛屿。黄色沙尘颗粒含有更多的硫和重元素，如锰和锌。这些颗粒物从亚洲大陆的工业区输送到日本，并可能通过与人为气溶胶混合吸收这些元素。这些结果是通过分析单个气溶胶颗粒获得的，而不是通过对许多颗粒进行平均测量的整体分析获得的。通过对黄沙粉尘的单颗粒分析，可以更好地了解黄沙粉尘在输送过程中的形成过程。腐蚀层的厚度和元素分布可以在纳米尺度下确定。当Cr含量低于0.1wt%时，腐蚀显著加剧。少

项目成果

DEVELOPMENT OF MICROBEAM SCANNING SYSTEM

微束扫描系统的开发

• 发表时间: 2007
• 期刊: International Journal of PIXE Vol. 17(1&2)
• 作者: R.Oyama;S.Matsuyama;K.Ishii;H.Yamazaki;Y.Kikuchi;K.Inomata;Y.Watanabe;A.Ishizaki;Y.Kawamura;T.Yamaguchi;G..Momose
• 通讯作者: G..Momose

Elemental Mapping of plants using submilli-PIXE camera

使用 submilli-PIXE 相机绘制植物元素图

• 发表时间: 2007
• 作者: H. Yamazaki ;et. al.
• 通讯作者: et. al.

Progress and application of the Tohoku microbeam system

东北微束系统的进展及应用

• 发表时间: 2007
• 期刊: Nuclear Instruments and Methods B260
• 作者: S. Matsuyama;et. al.
• 通讯作者: et. al.

DEVELOPMENT OF AN IN-AIR ON/OFF AXIS STIM SYSTEM FORQUANTITATIVE ELEMENTAL MAPPING

空中离轴刺激系统定量元素测绘的开发

• 发表时间: 2006
• 期刊: International Journal of PIXE 16
• 作者: K. Inomata ;et. al.
• 通讯作者: et. al.

3D-CT imaging using characteristic X-rays and visible lights produced by ion micro-beam bombardment

• DOI: 10.1016/j.nimb.2006.03.127
• 发表时间: 2006-08
• 期刊: Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
• 影响因子: 1.3
• 作者: K. Ishii;S. Matsuyama;H. Yamazaki;Yutaka Watanabe;Y. Kawamura;T. Yamaguchi;G. Momose;Y. Kikuchi;A. Terakawa;W. Galster