Preparation of Optical Waveguide Devices with Polymer Nano-Assemblies for Molecular Sensing

用于分子传感的聚合物纳米组件光波导器件的制备

• 批准号: 12450342
• 负责人: MIYASHITA Tokuji
• 金额: $ 9.66万
• 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: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450342/
• 关键词: LB film; optical waveguide; surface plasmon; charge transfer; polymer; optical switching; 高分子LB膜; センサー; 光機能性

This project aims at optical waveguide application for molecular sensing. Polymer nano-assemblies consisting of LB films was used and coupled with various optical techniques, such as integrated optical waveguide and surface plasmon resonance technique. The findings were summarized as follows;1.Optical Waveguide Application for Polymer MonolayerMonolayers from the copolymer of 9-anthrylmethyl methacrylate (AMMA) with neopentyl methacrylamide (nPMA) were deposited on a tapered quartz waveguide by Langmuir-Blodgett (LB) technique, and spectroscopic properties of the copolymer (p(nPMA-AMMA)) monolayer were precisely monitored by integrated optical waveguide technique. Magnitude of absorbance increased by a factor of 200 compared with transmission UV-Vis spectroscopy. Consequently, photo-cross-linking reaction in p(nPMA-AMMA) LB films was characterized easily and accurately as a function of irradiation time.2.In situ Observation for Positive-tone Photopatterns in Polymer LB FilmsCopolymer L … More B films composed of N-dodecylacrylamide (DDA) which is known to form a stable monolayer and a photo-degradable monomer, tert-butyl-4-vinylphenyl carbonate (tVPC), were prepared. When deep UV light was irradiated onto the copolymer LB films (p(DDA/tBVPC)) in air, the photodecomposition took place, consequently the thickness in the LB film was gradually decreased. On the other hand, there were no significant changes in the thickness with the irradiation at the argon atmosphere.3. Optical Switching Devices based on Interlayer Charge-Transfer Complex InteractionFluorescence quenching of pyrene molecules in polymer LB films was studied. An electron donor moleucule N, N-dimethylaniline and an electron acceptor molecule 1,3-dinitrobenzene were used. Pyrene fluorescence was quenched by donor and acceptor molecules in polymer LB films through inter layer charge-transfer. This implies that new transient species generate. Optical switching was demonstrated by using the charge-transfer reaction in surface plasmon resonance configuration. The probe beam intensity (at 441.6 nm) was modulated repeatedly by pumping light (>350 nm). Less

本课题旨在研究光波导在分子传感中的应用。利用LB薄膜组成的聚合物纳米组件，并与集成光波导和表面等离子体共振技术等多种光学技术相结合。研究结果总结如下：采用Langmuir-Blodgett （LB）技术将9-甲基丙烯酸甲酯（AMMA）与新戊基甲基丙烯酰胺（nPMA）的共聚物单层沉积在锥形石英波导上，并利用集成光波导技术对共聚物（p(nPMA-AMMA)）单层的光谱特性进行了精确监测。与透射紫外-可见光谱相比，吸光度增加了200倍。因此，p(nPMA-AMMA) LB薄膜的光交联反应可以很容易和准确地表征为辐照时间的函数。制备了由n -十二烷基丙烯酰胺（DDA）和可光降解单体碳酸叔丁基-4-乙烯基苯基酯（tVPC）组成的B膜。当深紫外光在空气中照射共聚物LB膜（p(DDA/tBVPC)）时，LB膜发生光分解，LB膜厚度逐渐减小。另一方面，在氩气气氛下辐照后，其厚度没有明显变化。基于层间电荷转移配合物相互作用的光开关器件研究了聚合物LB膜中芘分子的荧光猝灭。电子给体分子N， N-二甲基苯胺和电子受体分子1,3-二硝基苯。在聚合物LB膜中，施主分子和受体分子通过层间电荷转移猝灭芘荧光。这意味着产生了新的暂态物种。利用表面等离子体共振结构中的电荷转移反应证明了光开关。通过泵浦光（> ~ 350nm）反复调制探针束强度（441.6 nm）。少