LighttransmissionspectraofTHFsolutionsofpoly(C60-co-methylmethacrylate)sandpoly(C60-co-styrene)scontinuouslyred-shiftwithincreasingconcentration.Formationoffullerenenanoclustersmayberesponsiblefortheunusualspectralshiftwithconcentration.Ithaslongbeenscientists’dreamto'tune'material’spropertiesbysimplemeans,andtheC60-containingpolymersrepresentsuchagroupofnovelmaterialswhoseopticalpropertiesarepredictablyandreversiblytunablebyasimplechangeinconcentration.
