Fig. 2
From: Anisotropic and self-healing hydrogels with multi-responsive actuating capability
Preparation of anisotropic SNPP hydrogels. Low and high magnification SEM images of time-dependent network structure evolution in the polymerization process: a, d 5 min, b, e 10 min, and c, f 30 min. g SEM image of the surface of gel network. h Optical image of the hydrogel. i POM image of the gel viewed parallel to lamellar structure under cross-polarized light
