Fig. 1: Characterisation of TiO2 nanopillars.

Scanning electron micrographs of TiO2 nanopillar surface NW-850-5 from a top view a and 40° stage tilt b. NW-850-5 was generated at 850 °C for a duration of 5 min. Scale bars: 1 µm. Micrographs are representative of three thermal oxidation batches (n = 3), each batch containing 25 surfaces.