Figure 4.

Fluctuations of network hotspots. (a) Monochromatic CL emission patterns from two different network locations (415 nm diameter) indicated on the SEM image in (b) at the noted center wavelengths (20 nm bandwidth). The CL response of each location is strongly wavelength-dependent. (c) Point CL spectra extracted from close spatial positions (∼100 nm apart) on the silver network in (b) demonstrating strong variations in energy and intensity at proximal locations. The probe positions are indicated by the corresponding colored crosses and capital letters on the SEM image in (b). Figure S5 shows the panchromatic CL image of (b).