Hydrogen detected by the naked eye: optical hydrogen gas sensors based on core/shell plasmonic nanorod metamaterials.

Nasir, Mazhar E; Dickson, Wayne; Wurtz, Gregory A; Wardley, William P; Zayats, Anatoly V · Adv Mater · 2014

basic_science · Level V

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Abstract

Gold-core/palladium-shell metamaterials for hydrogen detection are presented. The more than 30% change in both the reflection and transmission from the metamaterial layer that is observed when the layer is exposed to 2% hydrogen mixture is clearly noticeable to the naked eye as a change in the brightness of light transmitted by the metamaterial. This sensor should make a contribution to the safety of processes involving hydrogen.