Green light-emitting LaPO(4) : Ce(3+):Tb(3+) koosh nanoballs assembled by p-sulfonato-calix[6]arene coated superparamagnetic Fe(3)O(4).

Superparamagnetic fluorescent nanocomposites based on doped lanthanide phosphate and magnetite nanoparticles are accessible through a facile one-pot method. The bifunctional nanocomposites adopt a koosh ball structure with both fluorescent and superparamagnetic properties for individual components maintained in the final nanostructure.