Although initially demonstrated in nanostructures made of noble metals (Ag and Au), such effects can be achieved with other materials, provided they behave optically as a metal. In this context, there is a strong interest in finding alternative plasmonic materials overcoming the limits of noble metals, for instance the lack of tunability in their optical properties and their limited stability at high temperatures. Compounds have appeared as relevant candidates because of their composition—tunable optical properties and some of them (TiN) enable high temperature operation.
SrMoO3, a perovskite compound, has been recently considered as an alternative plasmonic material. Its optical properties can be tuned by mechanical deformation of its crystal lattice. In their paper, Matthew P. Wells and coworkers investigate the thermal stability of this material. It remains optically metallic after being annealed in air up to 500ºC, and up to 700ºC if a pre-annealing in nitrogen is performed. It is suggested that it could perform better than TiN for near-infrared photothermal therapy.
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