Fig. 7From: Fabrication of NaYF4:Yb,Er Nanoprobes for Cell Imaging Directly by Using the Method of Hydrion Rivalry Aided by Ultrasonic a The sketch map of bio-labeling procedural of HeLa cells. b–e The confocal luminescence images of HeLa cells incubated with UCNPs at 37 °C for 16 h, respectivelyBack to article page