Surface plasmon resonance (SPR) in nanofibers of cesium titanium bromide CsTiBr3 synthesized by two-stage deposition technique

Abstract

Abstract The optical phenomenon of surface plasmon resonance (SPR) finds applications in bio-imaging, photocatalysis, biosensors, LED, and solar cells. In the present study, the SPR property of lead-free nanofibers of cesium titanium bromide (CsTiBr3) synthesized by a two-stage deposition technique is reported for the first time. The optical properties and SPR in CsTiBr3 are mainly promoted by the spherical-shaped metal cluster and concave-shaped metal neck formation of cesium bromide crystal. The spherical-shaped metal cluster formation is confirmed by SEM and HRTEM analysis. The intensity of optical absorption and emission of CsTiBr3 are amplified by SPR. The intensified absorption and emission of photons make CsTiBr3 a promising candidate for solar cells, bioimaging, biosensors, and photocatalysis.