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Interactions of protein corona-coated nanoparticles with MDA-MB-468 cells. Confocal and STED images of (a) MSN, (b) VSN, and (c) WSN nanoparticles after incubation with cells followed by fixation. Zoom-in STED images show nanoparticles internalized through cellular membranes. Pixel size in the images is 20 nm.
