Research Status in the Use of Surface-Enhanced Raman Scattering (SERS) to Detect Pesticide Residues in Foods and Plant-Derived Chinese Herbal Medicines

Figure 4

TEM images of different nanosubstrates for SERS analyses: (a) AuNPs; (b) AgNFs; (c) AuNRs; (d) gold nanocages; (e) bipyramid-AuNPs; (f, g) gold nanostars; (h) Ag@Au nanostructures; (i) Au@AgNFs; (j) AuNR array; (k) AuNS@Ag; (l) Au@AgNP array.

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