Figure 8
From: Orientation in multi-layer chitosan hydrogel: morphology, mechanism and design principle
Hydrogel prepared by cylindrical mold.
(a) Schematic diagram of preparation of hydrogel by cylindrical mold; (b)–(c) Digital photographs of hydrogel, overall view and cross section, respectively; (d)–(f) Morphology of hydrogel at different positions; positions were marked out in (a) with corresponding letters: (d) Center of radial pattern, SEM images of hydrogel after freeze-drying; (e) Orientation in radial pattern, CLSM image, bright field; (f) Concentric layers, CLSM image, bright field.
