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光学传感器是一种利用光把介质与目标分子的相互作用转换为光信号的装置.光学干涉是光学传感器中常用的技术,具有无需标记、无破坏性、响应迅速等优点.在光学传感器中光的干涉主要源于从单层薄膜上下表面反射的光或者从多层薄膜各个界面处反射的光.由于纳米多孔薄膜具有较高的比表面积,将其应用于传感器中能够提高传感器的灵敏度、降低检测限.常见的薄膜类型主要有单层、双层、多层(光子晶体)等.本文综述了多孔硅、阳极氧化铝、二氧化钛、金属有机骨架等纳米多孔薄膜材料的光学干涉在传感器中的应用,并对其进行了展望.
Optical sensor is a device that uses light to convert the interaction between medium and target molecule into optical signal.It is a commonly used technique in optical sensor, which has the advantages of no marking, destructiveness, rapid response, etc. In the optical sensor, light Of the interference mainly comes from the light reflected from the upper and lower surfaces of the single-layer film or the light reflected from the interfaces of the multi-layer film.As the nano-porous film has a higher specific surface area, its application to the sensor can improve the sensitivity of the sensor and reduce Detection limits.The common types of thin films are single layer, double layer, multi-layer (photonic crystal), etc. In this paper, the optical interference of porous silicon, anodic alumina, titanium dioxide, metal organic framework and other nanoporous thin film materials in the sensor Application, and its prospects.