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TEM analysis of AuNP-S461-493.(A) Transmission electron microscopy of the AuNP-S461-493 conjugate operated at 200 kV. The nanoparticles were deposited in carbon/formvar coated nickel grids and recorded using a Gatan 4 K camera. The scale bar is 50 nm. (B) Size distribution of the nanoparticles. The diameter of 188 particles was measured in two orthogonal directions and the size distribution was fitted to a Gaussian distribution (red line) centered at 21.5 nm with a width of 7.1 nm.
