Low-Dimensional Palladium on Graphite-on-Paper Substrate for Hydrogen Sensing

To stabilize the detection signal of palladium-based hydrogen sensors on paper substrates, a graphite intermediate layer was painted on the surface of paper. The graphite-on-paper (GOP) substrate offers advantages such as good thermo-electrical conductivity, low cost, and uncomplicated preparation t...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Vol. 22; no. 10; p. 3926
Main Authors: Wang, Boyi, Hashishin, Takeshi, Dao, Dzung Viet, Zhu, Yong
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 22.05.2022
MDPI
Subjects:
Gases
Graphite
graphite on paper
hydrogen sensor
low-dimensional
Microelectromechanical systems
microfibers networks
Nanowires
Nitrogen
palladium
Phase transitions
Sensors
Thin films
palladium
microfibers networks
hydrogen sensor
low-dimensional
graphite on paper
ISSN:1424-8220, 1424-8220
Online Access:Get full text
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Summary:To stabilize the detection signal of palladium-based hydrogen sensors on paper substrates, a graphite intermediate layer was painted on the surface of paper. The graphite-on-paper (GOP) substrate offers advantages such as good thermo-electrical conductivity, low cost, and uncomplicated preparation technology. Quasi-1-dimensional palladium (Pd) thin films with 8 nm and 60 nm thicknesses were deposited on the GOP substrates using the vacuum evaporation technique. Thanks to the unique properties of the GOP substrate, a continuous Pd microfiber network structure appeared after deposition of the ultra-thin Pd film. Additionally, the sensing performance of the palladium-based hydrogen sensor was not affected, whether using GOP or paper substrate at 25 °C. Surprisingly, heating-induced loss of sensitivity was restrained due to the increased electrical conductivity of the GOP substrate at 50 °C.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s22103926