Glöckler Johannes, Jaeschke Carsten, Kocaöz Yusuf, Kokoric Vjekoslav, Tütüncü Erhan, Mitrovics Jan, Mizaikoff Boris
Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
JLM Innovation GmbH, Vor dem Kreuzberg 17, 72070 Tübingen, Germany.
ACS Sens. 2020 Apr 24;5(4):1033-1039. doi: 10.1021/acssensors.9b02554. Epub 2020 Mar 31.
According to their materials and operating parameters, metal oxide (MOX) sensors respond to target gases only by a change in sensor resistance with a lack in selectivity. By the use of infrared spectroscopy, highly discriminatory information from samples at a molecular level can be obtained and the selectivity can be enhanced. A low-volume gas cell was developed for a commercially available semiconducting MOX methane gas sensor and coupled directly to a mid-infrared gas sensor based on substrate-integrated hollow waveguide (iHWG) technology combined with a Fourier transform infrared spectrometer. This study demonstrates a sensing process with combined orthogonal sensors for fast, time-resolved, and synergic detection of methane and carbon dioxide in gas samples.
根据其材料和操作参数，金属氧化物（MOX）传感器仅通过传感器电阻的变化对目标气体作出响应，缺乏选择性。通过使用红外光谱，可以在分子水平上从样品中获得高度有区分性的信息，并提高选择性。为一种商用半导体MOX甲烷气体传感器开发了一个小体积气室，并将其直接与基于衬底集成空心波导（iHWG）技术并结合傅里叶变换红外光谱仪的中红外气体传感器相连。本研究展示了一种使用组合正交传感器对气体样品中的甲烷和二氧化碳进行快速、时间分辨和协同检测的传感过程。
