Time-Resolved Tunneling Electron-Induced Anti-Stokes Raman Spectroscopy of Interface Aggregate

界面聚集体的时间分辨隧道电子诱导反斯托克斯拉曼光谱

• 批准号: 16072203
• 负责人: FUKUMURA Hiroshi
• 金额: $ 60.67万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16072203/
• 关键词: Scanning Tunneling Microscopy; Nanotubes; Raman Specroscopy; Photoluminescence; Quantum Dots; Gold Nanoplates; 走査プローブ顕微鏡; ナノ材料; 化学物理; 固液界面; 分子分光

This project has aimed to improve spatial resolution of Raman and luminescence spectroscopy. A variety of samples such as carbon nanotubes, gold-metal nano triangles, molecular aggregates were adsorbed at the surfaces of graphite or indium tin oxide plates. The instruments for these measurements were designed and built up in the laboratory. Tunneling probes were made with the electro-chemical etching of silver/copper metal alloy wires or chemical coating of silver metal on electro-chemically sharpened tungsten wires. We have found that the spatial resolution of Raman spectroscopy was improved to be in the range of several tens of nanometer when nanotubes were measured ; however, the topographical images did not always correspond with the spectral images. This deviation is considered to be due to differences in the spaces where the plasmonic enhancement takes place and the tunneling current flows. Photoluminescence of cadmium serenade quantum dots on indium tin oxide plates showed significant dependence on the distance between the quantum dots and tunneling probes with a nanometer precision. Gold nano triangles adsorbed on indium tin oxide surfaces were found to give good atomic-flat surfaces for scanning tunneling microscopy as well as to give semi-transparent substrates for inverse-type optical microscopy. Moreover, we found that some parts of gold nano triangles emitted luminescence only by approaching tunneling probes. These results are expected to contribute the development of high spatial resolution spectroscopy for the nano world.

本项目旨在提高拉曼光谱和发光光谱的空间分辨率。碳纳米管、金-金属纳米三角形、分子聚集体等多种样品被吸附在石墨或氧化铟锡板表面。这些测量仪器是在实验室中设计和制造的。隧道探头是通过电化学腐蚀银/铜金属合金线或在经过电化学锐化处理的钨丝上化学镀银制成的。我们发现，当测量纳米管时，拉曼光谱的空间分辨率提高到了几十纳米的范围；然而，地形图像并不总是与光谱图像相对应。这种偏差被认为是由于发生等离子体增强的空间和隧道电流流动的不同所致。氧化铟锡板上镉小夜曲量子点的光致发光与量子点和纳米级隧道探针之间的距离有很大的依赖关系。金纳米三角形吸附在铟锡氧化物表面，为扫描隧道显微镜提供了良好的原子平坦表面，也为倒置光学显微镜提供了半透明的衬底。此外，我们还发现，金纳米三角形的某些部分只有通过接近隧道探针才能发光。这些结果有望为纳米世界的高空间分辨率光谱学的发展做出贡献。

项目成果

Effects of Circularly-Polarization on X-ray Pulse Emission From Distilled Water When Irradiated by Focused Femtosecond Laser Pulses

聚焦飞秒激光脉冲照射时圆偏振对蒸馏水 X 射线脉冲发射的影响

• 发表时间: 2006
• 作者: D. Sato;K. Hatanaka;H. Fukumura
• 通讯作者: H. Fukumura

Picosecond Time-resolved X-ray Diffraction Measurements of Si (111) Single Crystals Excited by a Low Intensity Femtosecond NIR Laser

低强度飞秒近红外激光激发的 Si (111) 单晶的皮秒时间分辨 X 射线衍射测量

• 发表时间: 2006
• 作者: H. Odaka;K. Hatanaka;H. Fukumura
• 通讯作者: H. Fukumura

Laser-induced Phase Separation and Its Application to Chemical Reactions

激光诱导相分离及其在化学反应中的应用

• 发表时间: 2005
• 作者: M. Kasuya;S. Kajimoto;T. Oori;J. Hobley;K. Hatanaka;H. Fukumura
• 通讯作者: H. Fukumura

"Low-Coordinated Surface Ions as Active Sites of Oxide Catalysts : A Theoretical MINDO/3, ab Initio and DFT Studies" (Invited)

“低配位表面离子作为氧化物催化剂的活性位点：理论 MINDO/3、ab Initio 和 DFT 研究”（特邀）

• 发表时间: 2004
• 作者: K. Hatanaka;H. Fukumura;H. Kondoh;N. U. Zhanpeisov
• 通讯作者: N. U. Zhanpeisov

Proceedings of 12th International Conference on Unconventional Photoactive Systems (UPS-12)

第十二届非常规光活性系统国际会议 (UPS-12) 论文集

• 发表时间: 2006
• 期刊: J. Photochem. Photobiol. A 183 (3)
• 作者: Watakabe A;Komatsu Y;Sadakane O;Shimegi S;Takahata T;Higo N;Tochitani S;Hashikawa T;Naito T;Osaki H;Sakamoto H;Okamoto M;Ishikawa A;Hara S;Akasaki T;Sato H;Yamamori T.;^*H. Fukumura
• 通讯作者: ^*H. Fukumura