Fig. 3.

(A) Schematic demonstration of direct ink writing of GO ink to develop aerogel microlattices. The addition of silica and catalyst to GO aqueous suspension enabled direct ink writing of GO ink. (B) Charts showing the apparent viscosity vs. shear rate and shear modulus vs. shear stress of GO ink with and without silica fillers. (Adapted with permission from Ref. [33], Copyright 2021, Springer Nature). (Ca-k) Photographs and SEM images of GO microlattices printed with calcium chloride as ionic gelation agent. (Adapted with permission from Ref. [32], Copyright 2018, John Wiley and Sons). (D) Schematic showing the coating process of GO to 3D printed PCL scaffolds. Proliferation index of PC-12 cells on 1–2 anisotropic design and average neurite length on 1–1 isotropic, and 1–2 and 1–3 anisotropic designs. (Adapted with permission from Ref. [73], Copyright 2020, Elsevier).