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(A) Schematic illustration of the synthesis of Au@4-MBN@Ag NPs. (B) Illustration of self-assembly of Au@4-MBN@Ag NPs at the cyclohexane-H2O interface. (C) Quasi-synchronous extraction and SERS detection of nicotine release from the snus pouch based on liquid-liquid interface self-assembling Au@4-MBN@Ag NPs.
