表面等离子体波共振技术应用于气体检测

Applications of Surface Plasmon Resonance Technique in Gas Sensing

本文简要介绍了表面等离子体波共振技术的基本原理,重点综述了该技术在气体检测研究中的应用。被检测的气体包括:常见的易燃易爆和有毒气体、有机气体及蒸气等。通过敏感膜材料的选择和优化、检测装置的改进、制膜方式和工艺条件、薄膜厚度的调整,来提高检测结果的灵敏度、选择性、可逆性、响应时间、脱附时间和重现性等重要参数。将表面等离子体波共振技术和其它技术联用可以在提高检测灵敏度的同时,实现对气体的远程监测。主要介绍了该技术和光纤技术的联用,此外还讨论了环境特别是湿度和温度对检测结果的影响。

In this paper, the new developments and basic principles of surface plasmon resonance technique are introduced, and its applications in gas sensing are discussed in detail, including toxic, explosive and organic gases etc. The sensitivity, selectivity, reversibility, response time, desorption time and reproducibility of the measurements can be improved by changing materials of sensing films, designing new detecting apparatus, improving methods of fabricating thin films, modifying the thickness of the thin film and so on. Integrating surface plasmon resonance technique with other techniques not only improves sensitivity significantly, but also enable to perform remote monitoring, particularly combine with optic fiber technique. The influence of environmental factors such as humidity and temperature on the measurements is discussed in detail.