Thermoplasmonics of Ag Nanoparticles in a Variable-Temperature Bath

• DOI: 10.1021/acs.jpcc.0c04085
• Publication Date: 2020-07-13T23:03:20Z
• Authors: Marzia Ferrera; Michele Magnozzi; Maurizio Canepa; Francesco Bisio
• Keywords: Tarnish; Plasmonic Nanoparticles; Nanometre

Silver represents, by and large, the best plasmonic metal available, due to its very low optical losses in a broad photon-energy range encompassing all visible spectrum. Its performances are, more often than not, severely hampered presence of few-nanometer thick surface-tarnish layer; thermal annealing under high-vacuum (HV) conditions may however lead decomposition, thereby allowing attain clean-metal response. Here, we report an experimental investigation temperature dependence response Ag nanoparticles, either clean or tarnished, means situ spectroscopies HV conditions. For tarnished observed dynamics decomposition contamination layer real time compared it with corresponding behavior spatially extended, flat surfaces. nanoparticles witness instead remarkable invariance localized-plasmon response, indicating as potential candidate for temperature-invariant thermoplasmonics applications.