Table 2.

Concentrations (ng mg^− 1) and amounts (μg) RhB in the casting gels and MN arrays, respectively. The values are given as the mean ± standard error, n = 6.

Formulation	Cargo	[RhB] (ng mg− 1) in casting gel	RhB (μg) per MN array
RhB/NP MNs	NP encapsulated RhB	226 ± 13	7.8 ± 0.3
Free-RhB MNs	Free-RhB	208	11.7 ± 0.6