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. 2019 Apr 23;123(25):15769–15776. doi: 10.1021/acs.jpcc.9b02363

Figure 3.

Figure 3

(a) Full-range and (b) zoom-in SERS spectra of DNT with concentrations from 0 to 20 μM; aggregation of Au NPs was triggered by 10 μM CB[7]. Spectra were baseline corrected and offset for clarity. (c) Corresponding plot of SERS intensity of the DNT main peak (marked by * in (a)) against DNT concentration. Logarithmic fittings were performed to reveal correlation between SERS intensity and DNT concentration from 0.5 to 10 μM DNT. (d) Schematic illustration of precise plasmonic nanojunctions within dynamic aggregates of Au NPs formed by CB[7] for DNT detection (not to scale).