Figure 6From: The effect of nanoparticle size on the probability to cross the blood-brain barrier: an in-vitro endothelial cell model Calculated total free surface area per cell, for different sizes of GNPs. The free surface area decreased with the increase in GNP size. Results are presented as GNP surface area per cell, mean ± S.D of three samples. *P < 0.05, Student’s t-test.Back to article page