2021
DOI: 10.1016/j.snb.2020.129194
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A Ppb-level hydrogen sensor based on activated Pd nanoparticles loaded on oxidized nickel foam

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Cited by 22 publications
(12 citation statements)
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“…Hydrogen gas sensors and hydrogen gas have been actively investigated as promising clean energy alternatives [132,133] . Specifically, the absorption of hydrogen on Pd has been studied in terms of changes in mass, volume, and electrical/optical properties [134,135] .…”
Section: Soft Lithographymentioning
confidence: 99%
“…Hydrogen gas sensors and hydrogen gas have been actively investigated as promising clean energy alternatives [132,133] . Specifically, the absorption of hydrogen on Pd has been studied in terms of changes in mass, volume, and electrical/optical properties [134,135] .…”
Section: Soft Lithographymentioning
confidence: 99%
“…The formation of PdH x and the lattice expansion further affects the optical or electrical properties of Pd. , This reaction does not involve oxygen and can occur naturally at room temperature without the need to increase the temperature to hundreds of degree Celsius. Based on this unique reaction between Pd and H 2 , many optical and resistive H 2 detectors have been recently developed and reported in the literature. ,, However, optical detectors usually involve complex and expensive optoelectronic instruments to operate, while resistive detectors are attractive due to their high sensitivity, low power-consumption, less complex supporting electronics, and high compactness. Despite the efforts made by researchers to address various issues in resistive detector development, , enhancing the detector sensitivity or lowering its limit of detection (LOD) remains a significant ongoing effort.…”
Section: Introductionmentioning
confidence: 99%
“…Consequently, these broad peaks introduce inaccuracies in the determination of the sensing readout peak position, λ peak 18 , leading to higher signal noise, σ , and thus higher limits of detection (LoD), defined as the lowest analyte concentration measurable with a signal larger than 3 σ 7 , 28 . In fact, the detection limit still remains a significant challenge for plasmonic (and optical) sensors, with the state-of-the-art only at single-digit ppm; a comparably inferior performance than electrical sensors where ppb detection limit has been reported 29 33 (Supplementary Table 1 ). While ppm hydrogen sensitivity is appropriate for some applications, an ultralow detection limit, coupled with the abovementioned advantages of plasmonic sensing, is crucial for various application requiring local and early detection, such as hydrogen embrittlement in engineering structural materials 34 , and intragastric hydrogen production in some cases of bacterial infections 35 , 36 .…”
Section: Introductionmentioning
confidence: 99%