Fig. 1. Physicochemical characterization of 3D printed PLA and GO-PLA films. (a) Schematic diagram of the preparation of the GO-PLA precursor solution and 3D printing of the GO-PLA film. (b) Digital images of 1000, 100, and 10 μg mL−1 GO-containing and intact PLA films. (c) FE-SEM images, (d) water contact angles, (e) Raman spectra, and (f) protein adsorption on PLA and GO-PLA films. The asterisks represent statistical differences (****p < 0.0001).
