Application of Optical Waveguides to Chemical Sensing and Interface Studies

1)平板光波导化学传感系统：研制了平板光波导化学传感系统。表面有2 mm厚的聚丙烯酰胺凝胶薄层。在薄膜中共价引入阳离子和阴离子交换基团（分别为-SO_3^-或-N（CH_3）_3^+）和卟啉化合物，并将其应用于化学传感。2）用于界面研究的波导光谱测量系统：开发了使用光子计数的高灵敏度荧光测量系统、用于测量UV光谱的系统、连续线性二向色性测量系统、通过其可以测量折射率变化的ITO电极光波导系统。将该系统应用于亚甲基蓝和罗丹明B等染料分子在玻璃/水界面上的行为研究。3）液芯波导测量系统：研制了一套以Teflon AF-2400毛细管池为主体的分光光度测量系统，并成功地应用于钢样中硫的测定。研制了通道壁涂AF-2400的微芯片液芯波导系统。此外，新提出了一种使用鞘流的液体/液体光波导，其中芯和包层都是液体。波导不仅形成与不混溶的溶剂，但也混溶的。提出了一种微芯片液/液光波导。

1) Slab optical waveguide chemical sensing system : Developed were slab optical waveguides which have a ca. 2mm thick polyacrylamide gel thin layer on their surface. In the thin layers, cation and anion exchange groups (-SO_3^- or -N(CH_3)_3^+, respectively) and a porphine compound were introduced covalently, and the waveguides were applied to chemical sensing. In particular, the porphine slab optical waveguide showed the stable pH response in the range from 1 to 2.2) Waveguide spectroscopic measurement systems for interface studies : Developed were a highly sensitive fluorescence measurement system using photon counting, a system for measuring UV spectra, a successive linear dichroism measurement system, an ITO electrode optical waveguide system by which refractive index changes could be measured. These systems were applied to the studies on the behavior of dye molecules such as methylene blue and rhodamine B at the glass/water interfaces.3) Liquid core waveguide measurement system : A spectrophotometric measurement system with Teflon AF-2400 capillary cell was developed and was successfully applied to the determination of sulfur in a steel sample. The microchip liquid core waveguide system in which the wall of the channel was coated by AF-2400 was also developed. Moreover, a liquid/liquid optical waveguide using sheath flow was newly proposed in which both core and clad were liquid. The waveguide was formed with not only immiscible solvents but also miscible ones. The liquid/liquid optical waveguide with a microchip was also proposed.