“…Centrifugation at 7500 rpm for 3 min markedly reduced the narrow peak at 719 nm, but did not significantly alter the broad fluorescence peak at 540 nm, suggesting that the fluorescence at 719 nm was emitted by less dissolved C 70 . This result is reminiscent of that observed for C 60 ‐pyridine suspensions, where fluorescence peaks at 440, 575, and 700 nm were assigned to C 60 nanoparticles, C 60 lace‐like clusters, and C 60 microbulks, respectively 10. However, the fluorescence bands of C 60 in GA were weaker and less distinctive than those observed for C 70 , possibly because of the greater symmetry and broader fluorescence emission of C 60 , which extends into the near‐infrared region 11, 12…”