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(a) UV-vis absorption spectrum, (b) TEM image, and (c) hydrodynamic diameter (measured by dynamic light scattering) of the as-prepared Au29–43(SG)27–37 NCs. (d) Photoluminescence spectra (λex = 365 nm) of Au29–43(SG)27–37 NCs (black line) and the mixture of Au29–43(SG)27–37 NCs and blood plasma (at 24 h after mixing, red line).
