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(a) Time-resolved fluorescence spectra of Au nanoparticles (green), Atto495 (orange), MnO@SiO2 (red), and Au@MnO@SiO2-Atto495 (blue) after excitation at λ = 400 nm by a 100 fs pulse indicating the absence of electron transfer between Au and MnO respectively Atto495 encapsulated within the SiO2 shell; (b) respective photoluminescence dynamics tracked at 500–550 nm.
