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Real-time Rayleigh scattering spectra of AuNP uptake and localization within living cells for (A) RGD-AuNPs, (B) RGD1/NLS1-AuNPs, and (C) RGD1/NLS10-AuNPs. The deconvoluted peaks show the plasmonic scattering bands of single nanoparticles (538 nm), small AuNP clusters (641 nm), and large AuNP clusters (745 nm) and the center of the Gaussian fits are denoted by dashed lines.
