Results of the optical characterization. (a) Porosity dependence on the pore-widening time. (b) Thickness dependence on the total charge. (c) Effective refractive index of the NAA layer for the wavelength λ = 750 nm as a function of the pore-widening time. The dashed lines are a guide to the eye.
Rahman et al. Nanoscale Research Letters 2012 7:474 doi:10.1186/1556-276X-7-474