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. 2022 Jan 17;3(2):100740. doi: 10.1016/j.xcrp.2022.100740

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© 2022 The Author(s)

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Design and preparation of the antigen collector by attaching a test strip to an N95 mask

(A and B) Pictures of the respiratory tract model: front (A) and bottom (B).

(C and D) Pictures of the remodeled N95 mask equipped with test strips: front (C) and side (D).

(E) Image of an atomizer spraying AIE 2 NPs PBS solution into the respiratory tract model.

(F) Hydrodynamic diameter distribution, measured by DLS, in PBS buffer (pH 7.4) and transmission electron microscopy (TEM) image (inset) of AIE 2 NPs. Scale bar in the TEM image, 300 nm.

(G) The hydrodynamic diameter of AIE 2 NPs as a function of storage time. The error bars can be defined as the SD calculated by testing the hydrodynamic diameter of three parallel samples for each sample.