![]() ![]() Moreover, the shear-thinning properties of Xg in the precursor solution allowed the e-skin to be printable, and the anti-inflammatory functions of de-coordinated Xg were beneficial for wound healing. During this reduction process, the e-skin realized three functions of real skin: (i) UV triggered a color change with detectable resistance alterations (ii) reactive oxygen species (ROS) were dramatically produced to defend against pathogens and (iii) the piezoresistant hydrogel became highly stretchable to perceive all-scale human motions. In the presence of sodium lactate and UV exposure, Fe( III) could be reduced to Fe( II), which de-coordinated the Xg/Fe( III) network. Here, we report an anti-bacterial, color-variable, ultraviolet (UV)-sensitive, shape-adaptive, and immunoregulatory e-skin based on a single- and dual-network switchable hydrogel composed of a covalent network of polyacrylamide (PAAm) and a coordinated network of xanthan gum (Xg)/iron ions. Simulating the comprehensive functions of native skin-and not simply the perception of external physical stimuli-by electronic skin (e-skin) has gathered increasing attention in the development of wearable devices and human-interactive technology. ![]()
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