Fig. 4From: Fabrication of NaYF4:Yb,Er Nanoprobes for Cell Imaging Directly by Using the Method of Hydrion Rivalry Aided by Ultrasonic 1HNMR spectra of three samples. a OA dispersed in CDCl3. b OA-capped samples dispersed in DMSO. c OA-free samples dispersed in D2OBack to article page