Figure 1. The nano-wrinkled structure enhanced flexible photothermal membranes by solvent induced recrystallization. (a, b) The micromorphology of nano wrinkled photothermal membranes. (c) White blood cell with wrinkled membrane morphology [12]. (d) The solvent induced recrystallization process. (e) The original PLLA membrane. (f, g) The TEM of CS and MWCNTs. (h) The structure of photothermal fibrils. (i) The comparison of reflectance and absorptance by UV-vis-NIR spectroscopy for photothermal membranes. UV: wavelength < 400 nm; vis: 400 nm <= wavelength <= 780 nm; NIR: wavelength > 780 nm. (j) The schematic diagram of photothermal conversion of membranes.