University of Birmingham > Talks@bham > Metamaterials and Nanophotonics Group Seminars > Plasmonic and photothermal properties of TiN nanomaterials

Plasmonic and photothermal properties of TiN nanomaterials

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If you have a question about this talk, please contact Dr Miguel Navarro-Cia.

Transition metal nitrides (TMNs) have been recently considered as alternative materials to traditional coinage metals for plasmonic applications thanks to their similar optical response and the additional advantages of refractory nature and compatibility with microelectronic industry fabrication processes. This presentation will discuss the optical tunability of nanomaterials based on titanium nitride (TiN), which has emerged as prototypical TMN . We will first consider the general optical properties of thin compact films, their interplay with film structure and stoichiometry, and how films with good plasmonic quality can be realized. We will then move to TiN nanomaterials exhibiting broadband optical absorption for solar light harvesting applications. Nanotubes produced by electrochemical anodization and thermal nitridation and tree-like nanoporous films prepared by pulsed laser deposition will be presented as two examples employing scalable fabrication processes. Such materials exhibited nearly perfect light absorption thanks to the nanostructured morphology and/or partial oxidation (i.e., TiOxNy composition). As a result, they exhibited optimal photothermal properties, as confirmed by temperature measurements under moderate light concentration. We will finally review selected examples of applications of such materials, including solar steam generation with TiN nanotubes and gas-phase photothermal catalysis driven by the same coated with appropriate metallic catalysts.

This talk is part of the Metamaterials and Nanophotonics Group Seminars series.

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