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a) UV/Vis absorption spectra of 2 nm Au colloids and 118 nm Au-SNPs. b,c) Time-resolved bright-field micrographs of suspensions of 118 nm Au-SNPs (b) and Ad-grafted 2 nm Au colloids (c) during the scanning of a pulsed laser (6 ns, 532 nm; 32 mJcm−2 for 118 nm Au-SNPs and 265 mJcm−2 for Ad-grafted 2 nm Au colloids).
