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Characterization of Au/Au core/satellite particles. A, TEM image; B, SEM image; C, extinction spectrum; D, SERS spectrum of MMC; E, size distribution; F, correlative single‐particle real‐time imaging. MMC, 7‐mercapto‐4‐methylcoumarin; SEM, scanning electron microscopy; SERS, surface‐enhanced Raman scattering; TEM, transmission electron microscopy
