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(A) The size distributions of the N-isopropylacrylamide/sodium copper chlorophyllin (NIPAAm/SCC) nanogels with various SCC concentrations; (B) the size distributions of NIPAAm/NHMAAm/SCC nanogels containing 1% SCC with different NIPAAm/N-(hydroxymethyl)acrylamide (NHMAAm) ratios; (C) a transmission electron microscope (TEM) image of p(NIPAAm-co-NHMAAm-co-SCC) nanogels (80/19/1) counterstained with phosphotungstic acid (average size: 133 ± 30 nm, n = 120).
