Fullerols were electrostatically self-assembled into composite thin films with the precursor of poly(p-phenylene vinylene)(PPV) and with poly(diallyldimethylammonium chloride)(PDDA)．The composite thin films were characterized by UV-Vis spectroscopy (UV-Vis)

atomic force microscopy (AFM)

transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy(XPS)．The UV-Vis data showed that there were linear increments in the optical absorption at given wavelengths of the composite thin films as the bilayer numbers of the thin films were increased and that the assembling processes were consistent and reproducible from bilayer to bilayer. AFM images showed that clusters of dozens to a hundred or so nanometers in diameter were formed after the fullerols were assembled onto the substrates．If the aqueous solutions of fullerols were filtered before thin film assembling

the composite thin films would be statistically uniform．Otherwise

crystalline C60 would be embedded into the thin films．XPS data confirmed that C60 was modified into fullerols and electrostatically assembled with the polycations．Fullerols can easily be assembled with PPV precursor and PPDA into composite thin films

the resulting thin films being tougher than many self-assembled polyelectrolyte thin films perhaps due to stronger electrostatic attractive interaction between the fullerols and the polycations.