Fig. 1From: Facile Fabrication of BiF3: Ln (Ln = Gd, Yb, Er)@PVP Nanoparticles for High-Efficiency Computed Tomography ImagingMorphology and particle size of the BiF3: Ln@PVP NPs. A TEM images of the BiF3: Ln@PVP NPs and its particle size distributions (bottom right). B–F Dark-field TEM of image of BiF3: Ln@PVP NPs and corresponding TEM elemental maps of Gd, Yb, Bi and ErBack to article page