Synthesis of BaF2:Ce nanophosphor and epoxy encapsulated transparent nanocomposite

► BaF2:Ce nanophosphors were synthesized and optimized. ► Transparent polymer-based nanocomposites were prepared by index matching. ► Low scattering from nanoparticles is also critical for high transparency. ► Making nanocomposites bypasses the difficulties of preparing large pure crystals. ► Polymer nanocomposites may be advantageous for nuclear detection.