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(Left) Transmission electron microscopy (TEM) images of (A) mesoporous silica nanoparticles with particle sizes of 40 nm (MSNP-40) and (B) mesoporous silica nanoparticles with particle sizes of 100 nm (MSNP-100). (Right) Particle size distribution of MSNP-40 and MSNP-100 dispersed in Dubelcco’s modified eagle medium (DMEM) as measured by dynamic light scattering (DLS). The peak at 10 nm represents the fetal bovine serum (FBS) present in DMEM [34].
