Bromide-Assisted Anisotropic Growth of Gold Nanoparticles as Substrates for Surface-Enhanced Raman Scattering

Figure 4

SEM images showing results from gold nanoparticle synthesis with variances in concentration of 5-HIAA. (a) 0.150 mM, (b) 0.075 mM, (c) 0.038 mM, (d) 0.025 mM, and (e) 0.019 mM.

(a)

(b)

(c)

(d)

(e)