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(a) Schematic illustration of AuNIs surface functionalization and bioaerosol detection. The surface of the AuINs was functionalized with succinimidyl-ester to detect bioaerosol. (b) In situ phase sensing response of surface functionalization, including the anchor 11-mercaptoundecanoic (11-MUA) and activator EDC/NHS. Reprinted Qiu et al. [219]. Copyright 2020 American Chemical Society.
