Figure 3.

Optical 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.

Lan et al. Nanoscale Research Letters 2013 8:150   doi:10.1186/1556-276X-8-150
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