LANGMUIR-BLODGETT-FILMS OF FULLERENE DERIVATIVES

Two C-60 derivatives, dodecylaminofullerene (DAF) and multihydroxydode cylaminofullerene (MHDAF) were prepared. The isotherms showed that the limiting molecular areas of DAF and MHDAF are around 60 Angstrom(2) a nd 64.7 Angstrom(2) respectively, which suggests that the aggregations of the molecules at the air-water interface are decreased compared wi th that of C-60. The best transfer ratio could be enhanced to 0.7-1 by using the vertical dipping method. The structural characteristics of DAF Langmuir-Blodgett (LB ) films were studied by W-Vis spectroscopy, atomic force microscopy and transmission electron microscopy. The seco nd-order susceptibility chi((2)) and molecular hyperpolarizability (be ta) of 12-layer LB films of DAF are determined to be 3.26 x 10(-6) esu and 1.46 x 10(-28) esu respectively.