Table 2. Calculated permeability (P) of each AuNP through skin lipid bilayer.

System	AuNP size (nm)	Permeability (P)* (cm/s)
CG-AuNP	2	0.916 ± 0.124
	3	0.595 ± 0.108
	4	0.184 ± 0.056
	5	0.144 ± 0.062
	3 (Anionic)	(1.121 ± 0.112) × 10−15
	3 (Cationic)	(6.076 ± 0.341) × 10−16

^*Equation (1)