Fig. 2

Surface morphology and water contact angles. a AFM images of PVC, PAAm-Gelatin, and CS-AgNps@PAAm-Gelatin samples. b SEM images of PVC, PAAm-Gelatin, and CS-AgNps@PAAm-Gelatin samples. Changes of water contact angles of PAAm-Gelatin (c) and CS-AgNps@PAAm-Gelatin (d) after immersion in modified Gamble’s solution at 37 ℃ after 1, 4, 7, 21 days. e Carbon (C) contents of CS-AgNps@PAAm-Gelatin after immersion in modified Gamble’s solution at 37 ℃ for 1, 4, 7, and 21 days. f Micrographs of water droplets on the PAAm-Gelatin and CS-AgNps@PAAm-Gelatin samples after 1, 4, 7, and 21 days, respectively