Remote detection of hydrogen, without the utilization of electronic component or elevated temperature, is one of the hot topics in the hydrogen technology and safety. In this work, the design and realization of the optical fiber-based hydrogen sensor with unique characteristics are proposed. The proposed sensor is based on the gold-coated multimode fiber, providing the plasmon properties, decorated by the IRMOF-20 layer with high selectivity and affinity toward hydrogen. The IRMOF-20 layer was grown by a surface-assisted technique, and its formation and properties were studied using X-ray photoelectron spectroscopy, Raman, X-ray diffraction, and Brunauer-Emmett-Teller techniques. Simultaneous ellipsometry results indicate the apparent changes of the refractive index of the IRMOF-20 layer due to hydrogen sorption. As results, the presence of hydrogen led to the pronounced changes of plasmon band wavelength position as well as its intensity increase. The proposed hydrogen sensors were favorably distinguished by a high response/recovery rate, excellent selectivity toward the hydrogen, very low temperature dependency, functionality at room or lower temperature, insensitivity toward the humidity, and the presence of CO2, CO, or NO2. Additionally, the proposed hydrogen sensor showed good reversibility, reproducibility, and long-term stability.

中文翻译：

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基于金属有机框架层功能化的镀金光纤的快速全光学氢传感器。

在不利用电子元件或不提高温度的情况下，对氢气进行远程检测是氢气技术和安全性的热门话题之一。在这项工作中，提出了具有独特特性的基于光纤的氢传感器的设计和实现。拟议的传感器基于镀金的多模光纤，具有等离激元特性，并由IRMOF-20层装饰，具有高选择性和对氢的亲和力。通过表面辅助技术生长IRMOF-20层，并使用X射线光电子能谱，拉曼光谱，X射线衍射和Brunauer-Emmett-Teller技术研究了其形成和性质。椭圆偏振法的同时结果表明，由于氢的吸收，IRMOF-20层的折射率出现了明显的变化。结果，氢的存在导致等离子体激元能带波长位置的显着变化及其强度的增加。所提出的氢传感器以高响应/回收率，对氢的优异选择性，非常低的温度依赖性，在室温或较低温度下的功能性，对湿度不敏感以及存在CO2，CO或NO2的特性而受到好评。另外，提出的氢传感器显示出良好的可逆性，可再现性和长期稳定性。对湿度不敏感，以及是否存在CO2，CO或NO2。另外，提出的氢传感器显示出良好的可逆性，可再现性和长期稳定性。对湿度不敏感，以及是否存在CO2，CO或NO2。另外，提出的氢传感器显示出良好的可逆性，可再现性和长期稳定性。