Fig. 3From: Core–shell structured gold nanoparticles as carrier for 166Dy/166Ho in vivo generatorCharacterization of DyAu@AuNPs. a–d Representative TEM image of samples with different Dy:Au feeding ratios: Dy:Au = 1:3 (a), 1:5 (b), 1:10 (c), no Dy addition (d). Scale bar is 20 nm. See supporting information for size distribution histograms (Additional file 1: Fig. S1). e Hydrodynamic radius (RH) of the samples measured by DLS. f) UV–vis spectrum of the DyAu@AuNPsBack to article page