Figure 4
From: Preparation of hexagonal nanoporous Al2O3/TiO2/TiN as a novel photodetector with high efficiency
Optical properties of TiO2 and TiO2/TiN; (a) reflection and (b) absorption spectra. The inset of (b) shows \((\upalpha \mathrm{h}\upnu )\) 2 versus \(\mathrm{h }\upnu\) for energy gap calculation.
