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Three-dimensional images of membranes exposed to PBS solution at 35 °C for 1 h obtained by confocal microscopy. Side 1 corresponds to the surface that was in contact with the Petri dish during the drying step of the membrane fabrication (smoother surface), while side 2 refers to the surface exposed to the atmosphere (rough surface): (a,b) side 1 and 2 for C1X1HA0; (c,d) side 1 and 2 for C1X1HA0.4; (e,f) side 1 and 2 for C1 X1HA2; (g,h) side 1 and 2 for C1X1HA10.
