We report on the fabrication and characterization of ultrathin self-assembl
ed fullerene films. Using a carboxy-functionalized fullerene and poly(ethyl
ene imine), we prepare fullerene films by the layer-by-layer adsorption tec
hnique. Our structures exhibit a modulated electron density as evidenced by
the observation of a quasi-Bragg reflection in X-ray reflectivity studies.
This relatively high degree of order is attributed to the formation of hyd