Preparation of Surface-Enhanced Raman Scattering Substrates Based on Immobilized Silver-Capped Nanoparticles

Figure 4

Scanning electron microscopy images of the synthesized nanoparticles. After the synthesis, a droplet of the colloid has been dried out on a copper grid in all cases. (a) AgNO₃ reduced with NH₂OH·HCl. (b) AgNO₃ reduced with polyvinylpyrrolidone-10000. (c) AgNO3 reduced with polyvinylpyrrolidone-29000.

(a)

(b)

(c)