fig1

Figure 1. Four general strategies to achieve pressure visualization in e-skins, including mechanoluminescence^[13]. Reprinted with permission, Copyright 2022, Elsevier; piezophototronics^[15]. Reprinted with permission, Copyright 2013, Springer Nature; pressure-controlled electrochromism^[16]. Reprinted with permission, Copyright 2021, ACS; and structural color^[17]. Reprinted with permission, Copyright 2022, Springer Nature.