Fig. 1From: In Vivo Bio-distribution and Efficient Tumor Targeting of Gelatin/Silica Nanoparticles for Gene DeliverySchematics and TEM images of GS nanoparticles coated with PEG (a), nanoparticles coated with PEG and aptamer (b), and nanoparticles coated with PEG, HA2 peptide, and aptamer (c)Back to article page