Fluorescent electrospun nanofibres embedding dye-loaded zeolite crystals.

Zeolite crystals of about 500-800 nm in diameter and 1 mm in length have been embedded into polymeric fibers, the diameters of which ranged from 150 to 600 nm. Fluorescent nanometric wires containing bright crystals of different colors were obtained by dye-doping the polymer and dye-loading the zeolite crystals. The colors of both the fibers and the bright zeolite crystals can be easily tuned by changing the dyes inserted in the polymer and in the zeolites. The zeolite crystals are embedded into the wires with their axes well aligned along the wire axis, providing polarized emission that reflects the specific dye orientation within the parallel nanochannels of the zeolites.