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Development of high performance holographic gas-sensoring system and its application to the environmental monitoring.

高性能全息气体传感系统开发及其在环境监测中的应用

基本信息

批准号：
11650841
负责人：
BABA Ryo
金额：
$ 2.3万
依托单位：
Tokyo University of Mercantile Marine
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

The present research project was, by both theoretical and experimental approaches, aimed at the development of a high performance holografic gas-sensoring system and its application to the environmental monitoring. The major issues studied and the results obtained are as follows :1) Basic study for the development of holographic gas sensorsIn order to establish a durable and high performance holographic sensor, theoretical and experimental approachs were studied by using those holograms fabricated on the metal and semiconducting substrates which were expected to show specific affinity to selected sample gases.2) In situ observation of the surface processes at a metal oxide based hologramHolographic grating method was undertaken in order to study the photoinduced surface processes as modeled at TiO2 thin-film photocatalyst and at MoO3 photochromic thin films under the interfering uv-illumination. It was suggested that the microscopic distribution of reactants and/or reaction intermediates upon photocatalysis can be probed in terms of the corresponding spacial modulation of the surface refractive index. Based on the experimental results those characteristic parameters for the surface processes such as kinetics and the surface mass transfer coefficient were suggested to be estimated even for the submonolayer adsorbates.3) Selective detection of a sample gas with a holographic sensor on a hybrid substrateA photon-counting system equipped with the holographic gas-sensoring system based on a hybridized substrate such as gold and tinoxide films were demonstrated to detect sample gases. The result suggested that the hybrid system has possible selectivity for the gas sensoring.

本研究旨在通过理论和实验两种方法，开发一种高性能的全息气体传感系统，并将其应用于环境监测。主要研究内容和结果如下：1）全息气体传感器的基础研究为了建立一种耐用的、高性能的全息气体传感器，我们利用在金属和半导体基底上制作的全息图进行了理论和实验研究。2）金属氧化物基全息表面过程的原位观察采用全息光栅法研究了TiO_2光催化薄膜和MoO_3光致变色薄膜在紫外光干扰下的光致表面过程。有人建议，反应物和/或反应中间体的微观分布后，可以探测在相应的空间调制的表面折射率。根据实验结果，提出了即使在亚单层吸附物上，也可以估算表面过程的动力学和表面传质系数等特征参数的建议。3）用混合基片上的全息传感器对样品气体进行选择性检测基于杂化基底如金和氧化锡膜的传感系统被证明用于检测样品气体。实验结果表明，该混合系统对气体传感具有一定的选择性。