fig4

Figure 4. Pressure visualization through pressure-controlled electrochromism. (A) The schematic layout, circuit layout and photos of a pressure sensor integrated electrochromic device; (B) The absorption spectra of the device with increased pressure; (C) The color variation of the electrochromic device when different handshake forces were applied^[42]. Reprinted with permission, Copyright 2015, Springer Nature; (D) The schematic illustration (left) and working mechanism (right) of iontronic pressure visualization device; (E) The visualization and erasing process of the trace of dynamic forces^[46]. Reprinted with permission, Copyright 2024, ACS.