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Comparison between platinum nanoparticles decoration of graphite platelets in the absence (a,b,c) and in the presence (d,e,f) of 1-pyrenecarboxylic acid (PCA). a,d) Low-magnification scanning transmission electron microscope (STEM) micrographs showing the very selective decoration. b,e) High-resolution transmission electron microscopy (HR-TEM) micrographs of platelets surfaces. c,f) Morphology of the particles outside graphene, which are usually aggregated into clusters.
