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Chiral Plasmonic Hydrogen Sensors

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 pallad...

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Main Authors: Matuschek, Marcus (Author) , Singh, Dhruv Pratap (Author) , Jeong, Hyeonho (Author) , Nesterov, Maxim L. (Author) , Weiss, Thomas (Author) , Fischer, Peer (Author) , Neubrech, Frank (Author) , Liu, Na (Author)
Format: Article (Journal)
Language:English
Published: [February 15, 2018]
In: Small
Year: 2017, Volume: 14, Issue: 7, Pages: 1-7
ISSN:1613-6829
DOI:10.1002/smll.201702990
Online Access:Verlag, Volltext: https://doi.org/10.1002/smll.201702990
Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/smll.201702990
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Author Notes:Marcus Matuschek, Dhruv Pratap Singh, Hyeon-Ho Jeong, Maxim Nesterov, Thomas Weiss, Peer Fischer, Frank Neubrech, and Na Liu

MARC

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520 |a 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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