Fig. 1: Water-responsiveness of RSF films.
From: The role of water mobility on water-responsive actuation of silk
a WR materials swell and shrink in response to RH changes. b RSF films with tunable properties of confined water. c B/M water ratios of Silk-H, Silk-M, and Silk-L as a function of RH. Error bars represent the propagated SE of the deconvolution area fit. Dehydration-induced WR strain (d) and stress (e) of Silk-H, Silk-M, and Silk-L as a function of RH during dehydration. Data are presented as mean ± SD (n = 4 for (d) and n = 3 for (e)). The dash lines in (d) and (e) are the segmented linear fit of the data. f–h The Zener model used to analyze the WR viscoelastic behavior of RSF films. g, h show the changes in unrelaxed and relaxed moduli of EU (or 1/DU) and ER (or 1/DR), respectively, as RH decreases from 90% to 10%. Data in (g) are presented as mean ± SD (n = 3). i WR stress at their corresponding B/M water ratio plots of Silk-H, Silk-M, and Silk-L. Error bars represent the propagated SE and SD of the B/M water ratio and WR stress, respectively.
