Fig. 8. (a) Sketch of various sputtering–dewetting conditions and resulting metal/TiO2 nanocavity structures depending on the loading of sputter-coated metal; (b–f) SEM images of TiO2 nanocavity arrays decorated with Au particles by sputtering–dewetting different metal amounts, in terms of nominal initial thickness of the film – (b) 0.5, (c) 2, (d) 5, (e) 10, (f) 50 nm; (g) photocatalytic H2 generation data in terms of r H2 (9-h long runs) of various Au/TiO2 structures. Black columns are for Au/TiO2 nanocavity arrays and striped columns are for anodic TiO2 compact oxide (TiO2 CO) decorated with Au. Fig. (b–g) are reprinted from ref. 127 with permission from Elsevier.
