Figure 2From: Synthesis of NaYF4:Yb3+, Er3+ upconversion nanoparticles in normal microemulsions Characterization data for NaYF 4 : 20% Yb 3+ , 2% Er 3+ UCNPs. (A) TEM image (Inlet: HRTEM image of a single nanocrystal). (B) XRD pattern of the sample and the calculated line pattern for cubic phase of NaYF4 (JCPDS card, No. 77-2042).Back to article page