Direct measurement of excitation energy relaxation processes in small domains by near field microspectroscopy

通过近场显微光谱直接测量小域中的激发能量弛豫过程

• 批准号: 07454248
• 负责人: MASUHARA Hiroshi
• 金额: $ 0.45万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07454248/
• 关键词: near field optical microscope; fluorescence spectra; picosecond fluorescence dynamics; charge transfer complex; organic molecular crystal; tetracene; anthracene; mesoscopic; フォトン走査顕微鏡; ファイバーチップ; トポグラフィー; 蛍光イメージ画像; 有機微結晶; 蛍光生成減衰曲線; AFM; 光反応タ

By combining a scanning near field microscope and a single photon counting technique, we have developed a picosecond time-resolved near field fluorescence microspectroscopy system. Spatial resolution of 100 nm, temporal resolution of 50 ps, and spectral resolution of nm are simultaneously satisfeied, which is the most advanced system in our country and only a few laboratories have comparable systems as far as we know. The system has been applied to the following 3 organic molecular microcrystals. 1.Fluorescence spectra of deposited tetracene microcrystals were examined as a function of the crystal thickness of a few tens nm - submum, and it was found that the thinner is purer with the lower defect concentration. 2.fluorescence inhomogeneity of anthracene-tetrachlorophthalic anhydride charge transfer microcrystals were examined by measuring topography and fluorescence spectrum. Nonfluorescence domains, which are related or not related to topography, were discussed in terms of segregation of electron donor and acceptor molecules, orientation of donor-acceptor column, nonluminescent defect formation, and impurity contamination. 3.Mixed CT microcrystals of anthracene-tetrachlorophthalic anhydride and -pyromelitic anhydride show fiber-like structures whose orientation anisotropy and spatial inhomogeneity were considered with -100 nm resolution.

通过将扫描近场显微镜和单个光子计数技术相结合，我们开发了一秒钟的时间分布在田间荧光微光谱系统附近。同时满足了100 nm的空间分辨率，时间分辨率为50 ps，NM的光谱分辨率得到满足，这是我国最先进的系统，据我们所知，只有少数实验室具有可比的系统。该系统已应用于以下3个有机分子微晶。 1.沉积的四烯微晶的荧光光谱是根据几十nm- sumbum的晶体厚度的函数检查的，发现较薄的较薄纯净，缺陷浓度较低。 2.通过测量地形和荧光光谱，检查了苯二氯乙醇酸酐电荷转移微晶的荧光不均匀性。与地形相关或与地形无关的非荧光结构域是根据电子供体和受体分子的隔离，供体 - 受体柱的方向，非发光缺陷形成以及杂质污染的。 3.蒽二氯乙醇酸酐和 - 吡咯赤霉素的混合CT微晶显示了纤维样结构，其方向各向异性和空间不均匀性被考虑-100 nm分辨率。

项目成果

S.Shibata,Y.Yamane.K.kamada,K,Ohta,K.Sasaki,and H.Masuhara: "Laser-Emission from Dye-Doped Organic-inorganic Particle of Microcavity Structure" J.Sol-Gel Sci.Tech.(in press). (1996)

S.Shibata、Y.Yamane.K.kamada、K、Ohta、K.Sasaki 和 H.Masuhara：“微腔结构的染料掺杂有机-无机颗粒的激光发射”J.Sol-Gel Sci.Tech。

K,Sasaki,2.-Y.Shi,R.kopulmar,and H.Masuhara: "Three-dimensional pH Microprobing with an Optically-Manipulated Fluorescence Particle" Chem.Lett. 141-142 (1996)

K、Sasaki、2.-Y.Shi、R.kopulmar 和 H.Masuhara：“利用光学操纵荧光粒子进行三维 pH 微探测”Chem.Lett。

H.Van Mingroat.L.viaeue,M Van der Auwzyaer and F.C.De Sihryvx,.M.Ichikawa H.Fukumura,and H.Masuhara: "A nanosecond transient absorption study of photoinduced heat generation in microcrystals of x-metal free phthalocyanine dispersed in polymer films" J.Phy

H.Van Mingroat.L.viaeue、M Van der Auwzyaer 和 F.C.De Sihryvx、.M.Ichikawa H.Fukumura 和 H.Masuhara：“无 x-金属酞菁分散微晶中光生热的纳秒瞬态吸收研究

S.Shibata,Y.Yamane,K.Kamada,K.Ohta,K.Sasaki,H.Masuhara: "Laser-Emission from Dye-Doped Organic-inorganic Particle of Microcavity Structure" J.Sal-Gel.Sci.Tech.(in press). (1997)

S.Shibata，Y.Yamane，K.Kamada，K.Ohta，K.Sasaki，H.Masuhara：“微腔结构的染料掺杂有机-无机颗粒的激光发射”J.Sal-Gel.Sci.Tech。

M.Rucker,P.Varoppin,F.C.D_2S.Snhryver,S.J Ter Horst,J.Hotta,and H.Masuhara: "Fluorescence Mapping.and Photobleaching of Dye-Labeled Latex Particles Dispersed in PVA Matrices with a Near-Field Optical Microscope" Macromolecules. 28. 7530-7535 (1995)

M.Rucker、P.Varoppin、F.C.D_2S.Snhryver、S.J Ter Horst、J.Hotta 和 H.Masuhara：“利用近场光学显微镜对分散在 PVA 基质中的染料标记乳胶颗粒进行荧光映射和光漂白”