Engineered Silica Surfaces with an Assembled C60 Fullerene Monolayer

A covalently assembled monolayer of 61-(p-hydroxyphenylmethano)fullerene [C60] mols. was synthesized. Both static and dynamic contact angle measurements show that the hydrophobic character increases upon the fullerene linkage. At. force microscopy lithog. shows that the depth of the monolayer is .apprx.19 .ANG.. UV-visible spectra are well-tuned with the presence of the fullerene on the SiO2 surfaces. The surface at. compn., studied by angle-resolved x-ray photoelectron spectra, shows a monotonic increase of the C signal upon decreasing the photoelectron takeoff angles, thus confirming the upper layer nature of this signal. Room-temp. photoluminescence spectra, under controlled atm., show that the oxygen presence influences considerably the luminescence quantum yield.