Electrochemistry of composite films of C60 and multiwalled carbon nanotubes: A robust conductive matrix for the fine dispersion of fullerenes

The electrochemical behavior of a C60/MWCNT (multi-walled carbon nanotube) film cast on GC electrode in acetonitrile solution was investigated. Repeated cyclic voltammetric scans transformed the precursor to a C60–MWCNT composite film which exhibited reversible electron-transfer reactions and superpose the redox feature of the bare MWCNTs with monotonic charge injection over the whole potential range. This is in contrast to both C60 film and peapods of C60 inside carbon nanotubes but resembles the behavior of C60 dissolved in organic solutions. The formation and structure of the C60–MWCNT composite films were studied by UV–Vis, FT-IR, and TEM.