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. 2021 Jul 28;17(42):2102453. doi: 10.1002/smll.202102453

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© 2021 Wiley‐VCH GmbH

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

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a) General representation of the components of the nanocomposite layer on the surgical mask. b) Schematic illustration for the spray coating of the shellac/Cu nanocomposite layer on the surface of the nonwoven PP fibers using a microfluidic device. c) Virus inactivation by various photothermal and photocatalytic mechanisms upon solar irradiation and self‐cleaning due to the hydrophobicity of the modified surface. d) The appearance of the modified photoactive antiviral mask (PAM). e) SEM images of the nonwoven PP fibers before and after coating with shellac/Cu nanocomposites. f) Contact angle and water‐adsorption behavior of the masks. g) Increasing the temperature of the pristine and modified mask upon solar irradiation versus time. Reproduced with permission.^[ ⁷⁷ ^] Copyright 2021, American Chemical Society.