期刊
SMALL
卷 14, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201702990
关键词
hydrogen; GLAD; palladium; plasmonics; sensors
类别
资金
- Sofja Kovalevskaja grant from the Alexander von Humboldt-Foundation
- Marie Curie CIG grant
- European Research Council (ERC Dynamic Nano) grant
- ERC grant Chiral MicroBots
In this article, a chiral plasmonic hydrogen-sensing platform using palladium-based nanohelices is demonstrated. Such 3D chiral nanostructures fabricated by nanoglancing angle deposition exhibit strong circular dichroism both experimentally and theoretically. The chiroptical properties of the palladium nanohelices are altered upon hydrogen uptake and sensitively depend on the hydrogen concentration. Such properties are well suited for remote and spark-free hydrogen sensing in the flammable range. Hysteresis is reduced, when an increasing amount of gold is utilized in the palladium-gold hybrid helices. As a result, the linearity of the circular dichroism in response to hydrogen is significantly improved. The chiral plasmonic sensor scheme is of potential interest for hydrogen-sensing applications, where good linearity and high sensitivity are required.
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