Enhanced emission from a dual-state fluorescent dye immobilized by an elastomer host

Abstract

Dual-state R6G immobilized by an elastomer host was fabricated by adsorbing R6G onto the surface of an elastomer doped with R6G. For substrates of doping concentration 7.5×10^–4 g·mol^–1 cm^–3, increasing the adsorption concentration from 0 M to 0.01 M enhanced emission intensity up to a factor of two. The enhancement was found to be more pronounced near the surface with emission intensity falling 24% as fluorophore-interface separation changed from 1.5×10^–3 m to 2.0×10^–3 m. Significant excitation photoselection independent of adsorption concentration was observed with emission intensity for excitation parallel to the sample long axis 69.3% greater than excitation perpendicular to the surface. Peak emission wavelength was recorded at 550±3 nm with negligible variation in linewidth.