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. 2014 May 2;9(5):e96213. doi: 10.1371/journal.pone.0096213

Figure 6. WCA measurements of the samples fabricated at different anodization and annealing conditions.

Figure 6

WCA are shown for (A) not anodized samples, (B) 20 V anodized samples and (C) 60 V anodized samples. 60 V anodized samples possess low WCA after anodization and they are able to maintain their hydrophilicity when aged in air up to 11 days. The x-axis indicates the temperature and duration of annealing [Temp (°C)- Time (h)]. a: p<0.05 compared to annealed group, b: p<0.05 compared to aged group, c: p<0.05 compared to aged group. Error bars show standard deviation for n = 2 samples.