Figure 3From: Diameter-sensitive biocompatibility of anodic TiO2 nanotubes treated with supercritical CO2 fluidOptical images showing water droplets. On the as-grown (upper column), ScCO2-treated (middle column), and ScCO2-treated TiO2 nanotubes with UV light irradiation (lower column), respectively. Contact angles are denoted in the images.Back to article page