Fig. 2From: Fabrication of NaYF4:Yb,Er Nanoprobes for Cell Imaging Directly by Using the Method of Hydrion Rivalry Aided by Ultrasonic a–d The TEM images, the digital pictures, and XRD spectra of as-prepared OA-capped NaYF4:Yb,Er NPs and OA-free NaYF4:Yb,Er NPs, respectivelyBack to article page