The highly stable pristine C60 aqueous colloid solution (2.6 mg/mL, purity > 99.5%,) was prepared as described in [31 (link),32 (link)]. Ber was dissolved in a distilled water at initial concentration of 1 mg/mL. C60 and Ber solutions were mixed in a 2:1 C60-Ber molar ratio (208:104 µM), and the formation of a stable noncovalent nanocomplex was confirmed by the UV–Vis spectroscopy, atomic force microscopy (AFM, Solver Pro M system, NT-MDT, Moscow, Russia), and dynamic light scattering (DLS) measurements as described in [24 (link)].
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