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SERS-LFIA test system: (A) AuNS is functionalized with 4-ATP and conjugated to monoclonal antibodies to form the SERS tags; (B) LIFA test strip, and the response of the SERS-LFIA system to (C) influenza A nucleoprotein and (D) a negative control. Reproduced from Ref. [119] with permission of The Royal Society of Chemistry.
