Left : EELS (solid blue line) and CL (solid red line) spectra recorded at the tip of a single gold triangular nanoprism (60 nm side length) using a STEM. EELS and CL maps of the intensity of the resonance peak in the spectra are shown respectively inserted in blue and red frames. (Right) : for the larger particle (140 nm side length), the CL resonance is shifted compared to the EELS resonance, showing that the dipolar plasmon mode resonates at different energies in CL and EELS (reproduced and adapted from Losquin Ph.D. thesis Orsay (2013) and [132]).