We demonstrate ultra-sensitive near-infrared (NIR) fiber-optic gas sensors enhanced by metalorganic framework (MOF) Cu-BTC (BTC=benzene-1,3,5- tricarboxylate), which is coated on a single-mode optical fiber. For the first time, we obtained high-resolution NIR spectroscopy of CO2 adsorbed in MOF without seeing any rotational side band. Real-time measurement showed different response time depending on the concentration of CO2, which is attributed to the complex adsorption and desorption mechanism of CO2 in Cu-BTC. The lowest detection limit of CO2 we achieved is 20 ppm with only 5-cm long Cu-BTC film.
Xinyuan Chong, Ki-Joong Kim, Erwen Li, Yujing Zhang, Paul R. Ohodnicki Jr., Chih-Hung Chang, and Alan X. Wang, "Ultra-sensitive near-infrared fiber-optic gas sensors enhanced by metal-organic frameworks," Proc. SPIE 9702, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVI, 970207 (Presented at SPIE BiOS: February 13, 2016; Published: 7 March 2016); https://doi.org/10.1117/12.2214021.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the proceedings. They include the speaker's narration with video of the slides and animations. Most include full-text papers. Interactive, searchable transcripts and closed captioning are now available for most presentations.
Search our growing collection of more than 26,000 conference presentations, including many plenaries and keynotes.