Onset of Intense Surface Enhanced Raman Scattering and Aggregation in the Au@Ag System

Figure 6

The theoretical potential energy relative to kT versus surface separation is plotted below for clean nanoparticles and ones preincubated in 0.5 and 1 μM R6G. These clearly show the trend towards aggregation and clearly indicate that aggregation is expected for the 1 μM case.