Research Article
Superhydrophobic Polyimide via Ultraviolet Photooxidation: The Evolution of Surface Morphology and Hydrophobicity under Different Ultraviolet Intensities
Figure 7
Water droplets (10 μL) sliding on slightly tilted surfaces. The UV treatment parameters are 72 h at 10 mW/cm2 (a), 144 h at 10 mW/cm2 (b), and 144 h at 15 mW/cm2 (c), respectively. These were critical images obtained by slowly tilting the sample stage until the 10 μL water droplet started moving using a digital video camera.
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