Long-term stability of capped and buffered palladium-nickel thin films and nanostructures for plasmonic hydrogen sensing applications
نویسندگان
چکیده
One of the main challenges in optical hydrogen sensing is the stability of the sensor material. We found and studied an optimized material combination for fast and reliable optical palladium-based hydrogen sensing devices. It consists of a palladium-nickel alloy that is buffered by calcium fluoride and capped with a very thin layer of platinum. Our system shows response times below 10 s and almost no short-term aging effects. Furthermore, we successfully incorporated this optimized material system into plasmonic nanostructures, laying the foundation for a stable and sensitive hydrogen detector. ©2013 Optical Society of America OCIS codes: (160.3918) Metamaterials; (250.5403) Plasmonics; (280.4788) Optical sensing and sensors; (310.6845) Thin film devices and applications. References and links 1. G. Marbán and T. Valdés-Solís, “Towards the hydrogen economy?” Int. J. Hydrogen Energy 32(12), 1625–1637
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