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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) M1 laser printing procedure for the coating of neat Ag NPs on the N95 mask surface. b) M2 two‐step laser printing procedure for co‐immobilization of Ag and graphene on the N95 mask surface. c) The optical absorption behavior of pristine, Ag‐coated (M1) and Ag/graphene‐coated (M2) N95 mask. d) Contact angle of pristine and modified masks. e) Photothermal behavior of pristine and modified masks under sun irradiation. Reproduced with permission.^[ ⁸⁸ ^] Copyright 2020, American Chemical Society.