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. 2016 Oct 25;6:36005. doi: 10.1038/srep36005

Figure 1. Influence of Cu2+ on CS hydrogel structure.

Figure 1

(a) Schematic illustration of the formation of CS hydrogel; (b) Typical structure of CS hydrogel: oriented fibrous structure; (c) Multi-layered structure in CS hydrogel; (d) The cross section (top panel, native wet state) and longitudinal section (bottom panel, freeze-dried) of copper-CS hydrogels with different molar ratios of Cu2+ and amino group.