Liquid-Phase Synthesis of Colloids and Redispersible Powders of Strongly Luminescing LaPO(4):Ce,Tb Nanocrystals This work was supported by the Deutsche Forschungsgemeinschaft (DFG). We thank S. Bartholdi-Nawrath for help with the electron micrographs and J. Kolny for measuring the powder X-ray diffraction data |