基于纳米多孔金膜SPR效应的高灵敏气体传感方法研究

目前广泛用于气体探测的电子鼻存在工作温度高、易受电磁干扰、安全性较差等缺点，为了克服上述缺点，本项目提出研究基于纳米多孔金（NPG）膜表面等离子体共振（SPR）效应的光学气体传感方法，旨在利用NPG薄膜对表面等离子体光场的束缚作用和对气体分子的富集作用，显著增强光与待测物质的相互作用，进而实现室温下对有毒有害气体的高灵敏探测。为了达成这一目标，本项目将研究NPG-SPR气敏机制，研制NPG-SPR气体传感芯片，构建NPG-SPR气体检测系统，开展NPG-SPR气体传感芯片对挥发性有机化合物（VOC）的气敏特性测试与优化，进一步研究基于VOC分离膜技术提高NPG-SPR气体传感器选择性和灵敏度的方法。通过攻关上述关键技术和方法，最终实现基于NPG-SPR效应的高灵敏度、高选择性、高可靠性VOC气体传感器。本项目研究方案的实施为开发高性能光学气体传感器开辟一种新思路。

Electronic nose is widely used in gas detection. While it has shortcomings such as high working temperature, susceptibility to electromagnetic interference and poor safety. In order to overcome the above disadvantages, we propose to study the optical gas sensing method based on the surface plasmon resonance (SPR) effect of nanoporous gold (NPG) film, aiming to use the NPG film’s constraint on the surface plasmon wave and the enrichment effect on gas molecules to significantly enhance the interaction between light and material, thereby realizing highly sensitive detection for toxic gases at room temperature. In order to achieve this goal, we study the NPG-SPR gas sensing mechanism, develop the NPG-SPR gas sensor chip, build the NPG-SPR gas detection system, and carry out the test and optimization of gas sensing characteristics of NPG-SPR gas sensor chip for volatile organic compounds (VOCs). We further investigate the method of improving the selectivity and sensitivity of the NPG-SPR gas sensor based on the VOC separation membrane technology. By tackling the above key technologies and methods, we finally realize a high-sensitivity, high-selectivity and high-reliability VOC gas sensor based on the NPG-SPR effect. The implement of the project provides a new idea for the development of the high-performance optical gas sensor.