Fig. 3From: Wafer-Scale Fabrication of Sub-10 nm TiO2-Ga2O3 n-p Heterojunctions with Efficient Photocatalytic Activity by Atomic Layer DepositionSEM images of the ALD-deposited 2D (a) TiO2 and (b) TiO2-Ga2O3 heterostructure nano-filmsBack to article page