Journal
APPLIED PHYSICS LETTERS
Volume 113, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5052666
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Funding
- Center for Semiconductor Technology Research from The Featured Areas Research Center Program
- Ministry of Science and Technology, Taiwan [MOST-107-3017-F-009-002/-107-2218-E-009-031]
- Institute of Nuclear Energy Research, Taiwan [107A020]
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We demonstrated the application of CoPd magnetic devices in single (H-2) and dual (H-2 and CO) gas detection by varying the thin-film structure. The anomalous Hall effect provided the read-out signal of the devices. The dual-gas sensor was particularly useful for examining whether methane reformation by steam was completed during H-2 production where CO is a byproduct. Through in situ Fourier transform infrared and X-ray absorption spectroscopy, we discovered that H-2 detection involved a charge-transfer effect between Co and Pd in addition to a surface-adsorption process, for both multilayer and alloy structures; however, CO detection was solely associated with a surface-adsorption process, which only occurred in the alloy structure. The proposed devices demonstrated performances exceeding those of current commercial models (solid-state based) regarding power consumption (<5 mW) because they were not required to undergo a heating process. An Arduino prototype platform was employed to test the modularization of the device, and adequate feasibility was demonstrated. Published by AIP Publishing.
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