2. 5.1 Morphological analysis
The morphology of the various A-SA-Gel hydrogel printed samples was
examined by using a scanning electron microscope (SEM, HITACHI SU-1510,
Japan). All the samples were coated with gold for 120 seconds using a
gold sputter coater and then the surface and cross-sectional views were
analyzed under at an accelerating voltage of 10 kV.