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Characterizations of IO-Au core-shell NPCs of different sizes. (A) TEM images of 65 nm (left), 89 nm (middle) and 145 nm (right) IO-Au core-shell NSPs. Each size was determined by averaging the diameter from ~100 NPs in a spherical geometry (see inset illustration) from the TEM images. (B) DLS plots. (C) EDS spectra. (D) Optical images of IO-Au NPCs before and after magnetic separation.
