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.

将扫描近场显微镜与单光子计数技术相结合，建立了一套皮秒时间分辨的近场荧光显微光谱系统。该系统同时满足100 nm的空间分辨率、50 ps的时间分辨率和nm的光谱分辨率，是目前国内最先进的系统，目前国内只有少数几个实验室拥有类似的系统。该系统已被应用到以下3个有机分子微晶。1.研究了沉积的并四苯微晶的荧光光谱与几十nm -亚微米晶体厚度的关系，发现晶体厚度越薄，缺陷浓度越低，纯度越高。2.通过形貌测量和荧光光谱分析，研究了蒽-四氯苯酐电荷转移微晶的荧光不均匀性。非荧光域，这是相关或不相关的拓扑结构，讨论了电子供体和受体分子的分离，供体-受体柱的取向，非发光缺陷的形成，和杂质污染。3.蒽-四氯邻苯二甲酸酐和均苯四酸酐的混合CT微晶显示纤维状结构，其取向各向异性和空间不均匀性被认为具有~ 100 nm的分辨率。

项目成果

H.Yoshikawa, K.Sasaki, and H.Masuhara: "Near-Field Fluorescence Microspectroscopy of Tetracene Microcrystals" Mol.Cryst.Liquid Cryst.in press

H.Yoshikawa、K.Sasaki 和 H.Masuhara：“四苯微晶的近场荧光显微光谱”Mol.Cryst.Liquid Cryst.in press

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

Musubu Ichikawa,Hiroshi Fukumura,and Hiroshi Masuhara: "Ultrafast Electron-Transfer and Recombination Processes on Copper Phthalocyanine Solid/Water Interface as Revealed by Picosecond Regular Reflection Spectroscopy" J.Phys.Chem,. 99. 12072-12075 (1995)

Musubu Ichikawa、Hiroshi Fukumura 和 Hiroshi Masuhara：“皮秒正反射光谱揭示铜酞菁固/水界面上的超快电子转移和复合过程”J.Phys.Chem，。

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。

増原 宏,福村裕史,笹木敬司,朝日 剛: "新高分子実験学 第7巻" 共立出版(印刷中), (1996)

Hiroshi Masuhara、Hiroshi Fukumura、Keiji Sasaki、Tsuyoshi Asahi：《新高分子实验科学第 7 卷》Kyoritsu Shuppan（印刷中），（1996 年）