Wetting and Photocatalytic Properties of TiO₂ Nanotube Arrays Prepared via Anodic Oxidation of E-Beam Evaporated Ti Thin Films

Table 1

Roughness, wetting energy, and water contact angle of TNAs prepared at different anodizing voltages.

	20 V	25 V	30 V	35 V	40 V	45 V
Roughness (nm)	15.4	24.7	30.1	20.7	20.5	19.1
Wetting energy (mN/m)	69.1	70.3	72.2	71.3	71.5	69.4
Water contact angle (°)	18.3	15.1	7.5	11.7	12.1	18.0