Figure 3
From: Engineering optical properties of gold-coated nanoporous anodic alumina for biosensing
Reflectance spectra of samples with different t PW before gold deposition and after sputtering 10- and 20-nm gold on NAA. Solid black line represents samples without gold. Dashed blue line represents samples with 10 nm sputtered gold. Red symbols joined with red lines represent samples with 20 nm of gold. Plots on the left correspond to the UV–vis spectral region, while plots on the right correspond to the near-IR spectral region. (a, b) tPW = 0 min, (c, d) tPW = 6 min, (e, f) tPW = 12 min, and (g, h) tPW = 18 min.