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SEM images of SNS/Au nanohybrids synthesized using various HAuCl4(aq) concentrations (scale bar: 500 nm): a) SNS, b) SNS/Au dots, and c–h) SNS/Au NPs synthesized using c) 1.25 mm, d) 2.5 mm, e) 5 mm, f) 10 mm, g) 20 mm, and h) 30 mm HAuCl4(aq). The same volume of the second growth solution, 0.8 mL, was used in all cases.
