Abstract
A novel prototype optical sensor for monitoring cumulative hydrogen gas exposure was fabricated and evaluated. Chemical-to-optical transduction was accomplished by detecting the intensity of 670 nm laser light transmitted through a hydrogen getter-doped polymer film mounted at the end of an optical fiber; the transmittance of the composite film increased with uptake of hydrogen by the embedded getter. The composite film consisted of the hydrogen getter 1,4-bis(phenylethynyl)benzene, also known as DEB, with carbon-supported palladium catalyst embedded in silicone elastomer. Because the change in transmittance was irreversible and occurred continuously as the getter captured hydrogen, the sensor behaved like a dosimeter, providing a unique indication of the cumulative gas exposure.
Original language | English (US) |
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Pages (from-to) | 375-379 |
Number of pages | 5 |
Journal | Sensors and Actuators, B: Chemical |
Volume | 139 |
Issue number | 2 |
DOIs | |
State | Published - Jun 4 2009 |
Externally published | Yes |
Keywords
- Gas sensor
- Hydrogen getter
- Optical fiber
- Polymer
ASJC Scopus subject areas
- Instrumentation
- Materials Chemistry
- Surfaces, Coatings and Films
- Metals and Alloys
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering