Preparation of Silica Nanoparticles Loaded with Nootropics and Their In Vivo Permeation through Blood-Brain Barrier

Figure 3

Particle size [nm] of individual nanoparticles: pure silica nanoparticles, Si-piracetam, Si-pentoxifylline, and Si-pyridoxine. Particle size is expressed as mean diameter 2SD ( particles).