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Asymmetric membrane protrusion around IgG–PEG Janus particles. A schematic illustration (a), pseudo-colored SEM images (b), and TEM images (c) demonstrate the different membrane morphology on the two hemispheres of IgG–PEG Janus particles. In the pseudo-colored SEM images, the PEGylated hemispheres are shown in purple and the IgG-coated hemispheres are shown in green. Scale bars: 1 μm in SEM images (b) and 500 nm in TEM images (c).
