Figure 4From: Shape-controllable synthesis of hydrophilic NaLuF4:Yb,Er nanocrystals by a surfactant-assistant two-phase systemXRD patterns of the NaLuF 4 samples. (a) Standard data of cubic phase (JCPDS:27–0725), (b) standard data of hexagonal phase (JCPDS:27–0726), (c) IL-UCNPs, (d) SDS-UCNPs, (e) DDBAC-UCNPs, (f) PEG-UCNPs, and (g) Cit-Na-UCNPs.Back to article page