Development of micro spectroscopic techniques and its geochemical applications.

显微光谱技术的发展及其地球化学应用。

• 批准号: 13554018
• 负责人: KAGI Hiroyuki
• 金额: $ 7.04万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13554018/
• 关键词: SNOM; Raman Spectroscopy; AFM; high spatial resolution; surface analysis; photoluminescence; 表面分析; SNOM; AFM; 近接場; 発光; ラマンスペクトル; 顕微分光; 装置開発; 微小領域

Scanning Near-field Optical Microscopy(SNOM) was developed and attached to a commercial-based atomic force microscope (AFM). Our SNOM system can simultaneously obtain topographic images and photoluminescence/Raman signals from sample surface. Optical fiber with opening of 300 nm in diameter was applied for spectral and topographic analysis which enables us the spatial resolution of less than 300 nm. The studied samples were polycrystalline diamonds, carbonado, from Central African Republic (CAR) and ZrO_2-Al_2O_3 composite materials.Mapping of the photoluminescence intensity of carbonado using SNOM indicated that the emission intensity was lower at the grain boundaries ; the fringe of pores of carbonados revealed weakest intensity. Photoluminescence spectra of carbonado observed using optical microscopy and SNOM comprised three sharp bands at 504, 575 and 638 nm with their side bands and the color of photoluminescence changed according to its location. Raman spectra measured using optical microscopy revealed that the residual stress exists locally underneath the sample surface and the maximum stress value observed in this study was 0.72 GPa. Additionally, pressure dependence of the 575 nm band was measured using a diamond anvil cell up to 3.5 GPa. The 575 nm band shifted linearly to a lower wavelength with increasing pressure with a gradient of -0.57 GPa/nm. This relationship was applied to estimation of the stress distribution of carbonados using SNOM. No significant changes in peak positions of photoluminescence spectra were detected on the surface of carbonados. This result suggests that carbonado is well sintered and that the residual stress of carbonado exists locally inside the crystal.For ZrO_2-Al_2O_3 composite materials, we observed well-resolved stress mapping on the materials. The details will be published shortly.

开发了扫描近场光学显微镜（SNOM）并附着在商业基原子力显微镜（AFM）上。我们的SNOM系统可以同时从样品表面获得地形图像和光致发光/拉曼信号。光纤以直径为300 nm的开放式光纤进行光谱和地形分析，这使我们能够小于300 nm的空间分辨率。研究的样品是来自中非共和国（CAR）和Zro_2-Al_2O_3复合材料的多晶钻石，Carbonado。使用SNOM的Carbonado的光致发光强度图表示，在晶界处发射强度较低； Carbonados孔的边缘显示强度最弱。使用光学显微镜和SNOM观察到的Carbonado的光致发光光谱在504、575和638 nm的侧带中包括三个锋利的带，并根据其位置改变了光致发光的颜色。使用光学显微镜测量的拉曼光谱表明，在样品表面下方存在残留应力，本研究中观察到的最大应力值为0.72 GPA。另外，使用高达3.5 GPA的钻石砧细胞测量575 nm条带的压力依赖性。 575 nm带线性地向较低的波长移动，而压力升高，梯度为-0.57 GPa/nm。这种关系应用于使用SNOM对Carbonados的应力分布的估计。在Carbonados的表面上未检测到光致发光光谱的峰位置的显着变化。该结果表明Carbonado井井有条，Carbonado的残余应力在晶体内部存在。对于Zro_2-Al_2o_3复合材料，我们观察到了材料上解决良好的应力映射。详细信息将很快发布。

项目成果

Oxidation state of ytterbium incorporated in calcium carbonate and calcium fluoride.

碳酸钙和氟化钙中镱的氧化态。

• 发表时间: 2005
• 期刊: Chemistry Letters (印刷中)
• 作者: Yoshida et al.

Osawa T., Kagi H., Nagao K: "Mid-infrareed transmission spectra of individual Antarctic micromete orites and carboraceous chorditis"Antarctic Meteorite Research. 14. 71-88 (2001)

Osawa T.、Kagi H.、Nagao K：“单个南极微陨石和碳质脊索炎的中红外透射光谱”南极陨石研究。

Tsuno H., kagi H., Akagi T: "Effects of trau lantnanum ion on the stability of vateria and trausformation from vatente to calcite in an aguatic system"Bull. Chem. Soc. Jpn. 74. 479-486 (2001)

Tsuno H.、kagi H.、Akagi T：“trau 镧离子对水体系中 vateria 稳定性和从 vatente 到方解石的 trausformation 的影响”Bull。

Pressure dependence of OH stretching mode in F-rich natural topaz and topaz-OH

富氟天然黄玉和黄玉-OH 中 OH 拉伸模式的压力依赖性

• 发表时间: 2005
• 期刊: American Mineralogist 90
• 作者: Komatsu et al.

Infrared spectroscopic taxonomy for carbonaceous chondrites from speciation of hydrous components

根据含水成分的形态对碳质球粒陨石进行红外光谱分类

• 发表时间: 2005
• 期刊: Meteoritics and Planetary Science 40
• 作者: Osawa et al.