Figure 3.

Solution-phase SERS spectra recorded from (A) as-prepared Ag nanocubes (Figure 2B) and octahedrons (Figure 2F) prepared in the presence of PVP and (B) the same samples of nanocubes and octahedrons after their surfaces had been functionalized with 1,4-BDT. Band assignments for PVP and 1,4-BDT are labeled above the peaks. All samples were suspended in water and the suspensions had roughly the same particle concentration. cps = counts per second.