Figure 1

Transmission electron microscopy images of (a) S-SNPs, (b) M-SNPs and (c) P-SNPs. M-SNP, mesoporous silica nanoparticle; P-SNP, PEGylated silica nanoparticle; S-SNP, spherical silica nanoparticle.
Transmission electron microscopy images of (a) S-SNPs, (b) M-SNPs and (c) P-SNPs. M-SNP, mesoporous silica nanoparticle; P-SNP, PEGylated silica nanoparticle; S-SNP, spherical silica nanoparticle.