title: Hydrogen detected by the naked eye: optical hydrogen gas sensors based on core/shell plasmonic nanorod metamaterials.
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.
authors.affiliation: Department of Physics, King's College London, Strand, London, WC2R 2LS, UK.
authors.forename: Mazhar E
authors.initials: ME
authors.lastname: Nasir
authors.forename: Wayne
authors.initials: W
authors.lastname: Dickson
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Wurtz
authors.forename: William P
authors.initials: WP
authors.lastname: Wardley
authors.forename: Anatoly V
authors.initials: AV
authors.lastname: Zayats
keywords: hydrogen sensing; metamaterials; plasmonics; sensors