Fig. 4. EELS probing of plasmonic nanoaggregates (a) EELS intensity maps of silver nanoaggregates generated in NIR energy windows of 1.6–1.8 eV (trimers) and 1.4–1.6 eV (five-particle aggregate). The plasmon resonance at 1.4–1.6 eV corresponds to the energy range used in Fig. 2. (b) EELS intensity maps for silver dimers with different gap sizes. The plot shows normalized EEL signals in the gap as a function of gap widths. Adapted with permission from ref. 34, Copyright 2013 Springer.
