FIG. 8.

(a) Laser-fabricated graphene mask. (b) SEM of the graphene-coated nonwoven fiber within the surgical mask [(c) and (d)] Raman spectrum and water contact angle of the graphene-coated mask. (e) Illustration of the self-cleaning properties compared to the pristine blue mask (left). Photothermal performance of the masks. (f) Optical absorption. (g) Surface temperature measured by using infrared camera (h) and (i) after 5 min of solar illumination. Reprinted with permission from Zhong et al., ACS Nano 14(5), 6213–6221 (2020). Copyright 2020 American Chemical Society.¹²⁴