Figure 3

Electron energy loss spectra (a) and energy (b), intensity (c), and energy-filtered (d,e,f,g) maps. (a) Electron energy loss spectra of a dimer of gold nanoparticles linked through DNA strands to a silicon nitride membrane for the trajectories denoted on the HAADF image of the inset. The resonance peaks for (curves i, ii, iii, and iv) are located at 1.9, 2.1, 2.3, and 2.4 eV, respectively. (b) Energy map of the centers of the fitted Gaussian to the LSPR peaks. (c) Amplitude map with the value of the center of the fitted Gaussian to the LSPR peak. (d,e,f,g) Energy-filtered maps centered at 1.6, 2.0, 2.2, and 2.35 eV.