Fig. 9
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Basic wettability tests of the samples with disk geometry constructed without using bonding materials. Distilled water droplet (in color blue) and mineral oil droplet (in color orange) contact angle measurement at time 0 and 10 s (after placing these droplets on the flat surface of the samples) of the samples with plug geometry P1, P2, P3, P4, P5, P6, P7, P8.