Bimetallic nanoparticle-based localized surface plasmon resonance for enhanced sensitivity of reflective fiber optic H2 sensing

Yang-Duan Su; Jeffrey Wuenschell; Paul Ohodnicki

doi:10.1117/12.2663845

13 June 2023 Bimetallic nanoparticle-based localized surface plasmon resonance for enhanced sensitivity of reflective fiber optic H₂ sensing

Yang-Duan Su, Jeffrey Wuenschell, Paul Ohodnicki

Author Affiliations +

Proceedings Volume 12532, Optical Waveguide and Laser Sensors II; 1253205 (2023) https://doi.org/10.1117/12.2663845
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

In this work, we demonstrate a reflection-based nanocomposite-functionalized fiber H₂ sensor for ease of installation and H₂ sensing in energy storage, fuel cells, electrolyzers, and other similar devices. High-temperature H₂ fiber probes decorated with Au-Pt bimetallic alloy nanoparticles (NPs) in rutile titania matrix are characterized with scanning electron microscopy (SEM) and grazing incidence x-ray diffraction (GIXRD), and tested experimentally with varying H₂ concentration and cycling gas conditions. In response to reducing H₂, fully reversible reflectance intensity changes at the alloy NPs’ localized surface plasmon resonance (LSPR) absorption peak are demodulated in real-time. The reflection fiber probe coated with bimetallic Au-Pt NPs in titania show 15x higher sensitivity than corresponding monometallic Au NPs in titania. The demonstration of reflection hydrogen fiber probe provides an installation advantage in various reactor environment applications, and the investigation of the Au-Pt binary alloy system unfolds new sensitivity-enhancing pathways for NP-based LSPR modulation in reducing H₂ environment at high temperatures.

Conference Presentation

Citation Download Citation

Yang-Duan Su, Jeffrey Wuenschell, and Paul Ohodnicki "Bimetallic nanoparticle-based localized surface plasmon resonance for enhanced sensitivity of reflective fiber optic H₂ sensing", Proc. SPIE 12532, Optical Waveguide and Laser Sensors II, 1253205 (13 June 2023); https://doi.org/10.1117/12.2663845

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