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. 2021 Jun 23;11(13):8370–8381. doi: 10.1021/acscatal.1c01851

Figure 1.

Figure 1

(A) Representative FESEM image of BrGua-coated aggregated AgNPs. (B) SERS spectra recorded during BrGua dissociation on aggregated AgNPs under CW illumination at different time intervals using a 532 nm laser source (laser power: 0.2 mW; data acquisition time: 0.05 s; accumulation: 300) and marked bands in blue and pink correspond to the ring breathing mode of BrGua and Gua adduct, respectively, shown as (C) zoom-in view of the SERS spectra (500–1300 cm–1) recorded in panel A. (D) Plot showing change in SERS intensity of the ring-breathing mode of BrGua at 670 cm–1 against that of the Gua adduct at 693 cm–1 as a function of laser illumination time.