Figure 4From: Out-diffused silver island films for surface-enhanced Raman scattering protected with TiO2 films using atomic layer depositionOptical absorption spectra of the films. The films were prepared using annealing in hydrogen at 150°C and coated with ALD-TiO2 of different thicknesses as marked near the curves. The substrate spectrum is subtracted. The SPR positions are indicated with the lines.Back to article page