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

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Wang, Boyi
Hashishin, Takeshi
Dzung, Viet Dao
Zhu, Yong
Griffith University Author(s)
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2022
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Abstract

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 uncompli-cated 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 ap-peared after deposition of the ultra-thin Pd film. Additionally, the sensing performance of the pal-ladium-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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Sensors

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22

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10

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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Microelectromechanical systems (MEMS)

Micro- and nanosystems

Electronic sensors

Ecology

Electrical engineering

Electronics, sensors and digital hardware

Environmental management

Distributed computing and systems software

Science & Technology

Physical Sciences

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Chemistry, Analytical

Engineering, Electrical & Electronic

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Wang, B; Hashishin, T; Dzung, VD; Zhu, Y, Low-Dimensional Palladium on Graphite-on-Paper Substrate for Hydrogen Sensing, Sensors, 2022, 22 (10), pp. 3926

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