Figure 12.

AFM and rheology of peptide hydrogels: (A) AFM height image of an H2 peptide hydrogel, adapted from Scelsi et al. [286], Copyright (2018) Wiley-VCH GmbH & Weinheim; and rheology of RAPID hydrogels, showing a strain sweep (B) to determine the storage (G’) and loss (G”) moduli. Studying hydrogel behavior as a function of shear rate (C) provides the shear-thinning behavior, while cyclically applying and removing strain (D) determines the stress recovery properties, which gauge the injectability of a hydrogel. Adapted with permission from Tang et al. [84], Copyright (2019) American Chemical Society.