fig1

Figure 1. Application scenarios and piezochromic MOF film fabrication. (A) Schematic of interfacial pressure visualization using piezochromic films; (B) Crystal structure and piezochromic response of PCN-128; (C) Schematic illustration of the PCN-128 film architecture; (D) Solvent-regulation strategy for enhancing the structural stability of PCN-128; (E) Strategies for controlling the spatial uniformity of PCN-128 distribution on the substrate; (F) Images of PCN-128 film under ambient light; (G) Photoluminescence (PL) image of PCN-128 film under UV illumination; (H) Schematic of interfacial pressure detection test; (I) Interfacial pressure mapping using PCN-128 film (240 MPa). The elements in Figure 1F were photographed by the authors. DMF: Dimethylformamide; THF: tetrahydrofuran.