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Abstract Carbon lights up : A facile chemical method yields multicolor photoluminescent carbon dots derived from polymer/silica nanocomposites, which were prepared using surfactant‐modified silica spheres as carriers and resols (phenol/formaldehyde resins) as carbon precursor (see picture). The surface‐passivated carbon dots show good biocompatibility as potential bioimaging agents offering nanometer‐scale resolution. magnified image
Liu et al. (Wed,) studied this question.