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. 2020 Aug 16;2:100007. doi: 10.1016/j.talo.2020.100007

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© 2020 The Authors. Published by Elsevier B.V.

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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Fig 6 — Schematic representation of the thin film biosensor. (A) Unreacted thin film biosensor surface with covalently attached capture probe. The surface coating, silicon nitride (Si3N4), appears gold in white light. (B) Surface reacting with target sequence to produce thin film. Target immobilization triggers reactions that enzymatically transduce the formation of hybrids on the surface into molecular thin films causing a change in color from gold to purple. Republished from [203]; permission conveyed through Copyright Clearance Center, Inc, License Number 4876701161684.