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SEM images of 3D-printed and aged aerogel scaffolds prepared from alginate 6 wt.% and HA 16 wt.% inks (c,d) with and (a,b) without GA post-crosslinking step. All formulations were crosslinked with GA vapor. Aerogels were observed at two different magnifications. Intake in (a,c): visual appearance of the aerogel scaffolds with a well-defined 3D-pattern.
