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Size-controllable luminescent single crystal CaF2 nanocubesElectronic supplementary information (ESI) available: two TEM images and two PL spectra. See http://www.rsc.org/suppdata/cc/b3/b303614f/

“…Since CaF 2 is a widely used host material for rare earth ions, 11,16,17 a functionalization approach was undergone on the nanocubes by a solution-based chemical modifying process. Bright red or green luminescence was observed for Eu(III) or Tb(III) doped CaF 2 nanocrystals, respectively.…”

“…The morphology of the final products could be manipulated through controlling the synthetic parameters such as concentration and pH value. Furthermore, since CaF 2 is used as a host material for rare earth ions 11 these nanocubes could be functionalized by a simple chemical modified method to induce rare earth ions (e.g. Eu 3+ and Tb 3+ ) into the cubes, which endowed the nanocubes with luminescent (e.g.…”