Extended Data Fig. 8: Field filtration test.
From: Bioinspired capillary force-driven super-adhesive filter
a, Photo of exterior of HVAC system. b, Photo of PRO (green) and bare (orange) filters simultaneously installed in the HVAC system. c,d, SEM images of bare (c) and PRO (d) filters after 4 months operation. Insets are real photos of the filters (dimension of 594 mm × 594 mm). e-g, Total weight of filtered PM of bare (orange bar) and PRO (green bar) filters operated in indoor stadium (e), office building (f), and exhibition center (g). Errors show s.d.; n = 5 for indoor stadium and 3 for office building and exhibition center.
