Fast and All-Optical Hydrogen Sensor Based on Gold-Coated Optical Fiber Functionalized with Metal–Organic Framework Layer

Abstract

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 CO 2 , CO, or NO 2 . Additionally, the proposed hydrogen sensor showed good reversibility, reproducibility, and long-term stability.

Enhanced sensitivity of fiber SPR sensor by metal nanoparticle

“…The 12 nm gold nanosphere is chosen to enhance the sensitivity, the sensitivity reaches 5,140 nm/RIU. In Miliutina et al (2019a, 2019b, 2019c), a similar method was used to realize immobilization of gold nanoparticles with sharp edges on the thin gold layer, deposited on the multimode fiber surface for improvement of the sensor functionality. After a rough calculation, the average sensitivity was 3,384 nm/RIU which is lower than the highest sensitivity in this paper.…”

“…So, fiber SPR sensor has been widely used in biochemical detection, medical sample monitoring, environment and food detection in recent years (Wolfbeis, 2004; Shi et al , 2014; Chen et al , 2016; Weng et al , 2016; Gong et al , 2019). Besides, the metal-coated SPR fiber sensor functioned with all kinds of functional groups is used to realize the detection of the particular substance (Miliutina et al , 2019a, 2019b, 2019c, 2020). The traditional fiber SPR sensor is based on multimode fiber structure (Jorgenson and Yee, 1993, 1994; Ronot-Trioli et al , 1996; Tsai et al , 2005; Lin et al , 2008; Huang et al , 2013), which makes the sensitivity of fiber-based SPR sensors lower than that of prism-based SPR sensors because of the multi-mode transmission.…”

Hydrogen Sensing at Room Temperature Using Flame-Synthesized Palladium-Decorated Crumpled Reduced Graphene Oxide Nanocomposites

“…8,9 Therefore, rapid, stable, low-cost, and accurate detection of H 2 for a wide range of concentrations, above and below the LEL, in air or in other gases, remains a crucial unmet need. 10 Commercial chemo-resistive H 2 sensors are mainly based on metal oxides such as TiO 2 , SnO 2 , In 2 O 3 , and ZnO that usually work in a temperature range from 200 to 500 °C. 11,12 Maintaining high temperature increases power consumption and potentially introduces a source of ignition.…”

Surface functionalization of nanomaterials by aryl diazonium salts for biomedical sciences

“…[38,[79][80] This was used for the modification of gold surfaces including nanorods, nanotriangles, [81] nanodisks [38] or gold coated fibers. [82] For example, when nanorods are irradiated by a polarized laser beam along their long axis, modification occurs mainly on the tips of the nanorods. The same approach was performed on nanodisks, using successive irradiations under perpendicular directions, with two different diazonium salts.…”