Figure 7. The wearability of photothermal membranes. (a) The photothermal performance of membranes on human skin. (b) The photothermal maps of membranes on human skin. (c) Indoor performance of wearable photothermal membranes (0.3Wm-2 sunlight, 21 ˚C). (Sp1 is the temperature of PLLA; Sp2 is the temperature of the photothermal membrane; Sp3 is the temperature of human skin;The membranes (20 µm) are glued to cotton fabrics and contact directly with the human skin.) (d) Outdoor performance of wearable photothermal membranes (865Wm-2, 21 ˚C). (e) Investigation of cell viability (e: 12h; f: 24h), showing the good biocompatibility of photothermal membranes.