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

Figure 5

SEM images showing results from gold nanoparticle synthesis with variances in concentration of HAuCl₄. (a) 0.40 mM, (b) 0.30 mM, (c) 0.25 mM, and (d) 0.20 mM.

(a)

(b)

(c)

(d)