The fullerenes, C60 and C70. were prepared with high purity by high performance liquid chromatography. These materials could form condensed layers at the air-water interface. Under appropriate experimental conditions, we have fabricated four species of films, consisting of C60, C70 and their MiXtures with arachidic acid, onto various substrates by the Langmuir-Blodgett technique. The structural characteristics of these films were Studied by UV-visible and Fourier transform IR spectroscopies. scanning tunneling microscopy, transmission electron microscopy and low-angle X-ray diffraction measurements.