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. 2023 Jun 30;12(27):2301033. doi: 10.1002/adhm.202301033

Figure 2.

Figure 2

Characterization of alginate‐dopamine. A) The synthesis process of alginate‐dopamine. B) 1H NMR spectra of alginate, dopamine and alginate‐dopamine. C) UV–Vis spectra of alginate‐dopamine. D) FTIR spectra of alginate, dopamine and alginate‐dopamine. E) Rheological properties of the alginate‐dopamine hydrogels. The storage (G′) and loss (G″) moduli of the 2% (w/v) alginate‐dopamine hydrogel and 4% (w/v) alginate‐dopamine hydrogel at a frequency sweep mode are provided. F) The gelation photos of ALG‐DA. G) SEM images of alginate‐dopamine hydrogel. Scale bar, 100 µm.