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SEM images of the side-surface microstructure and morphology for the different 3D printed samples in this study at two different magnifications (all 3D printed samples with 300 µm printed layer thickness): (a,b) PLA/Ag/PEG using rec-01 filament, (c,d) PLA/Ag/PEG using rec-02 filament; (e,f) PLA/Ag/PVP using rec-03 filament; and (g,h) PLA/Ag/PVP using rec-04 filament.
