SIMULATION OF LANGMUIR-BLODGETT-FILM SURFACE STM IMAGES

The simulation of the STM image of a hydrocarbon tail of a fatty acid was carried out and compared to the experimental results. The simulati on procedure includes calculations of the distribution of an isolated molecule electronic density by the extended Huckel-Hoffmann method. An agreement between the calculated and experimental STM images of close ly packed Langmuir-Blodgett film of cobalt behenate on the graphite su rface was observed. The weak interactions between the graphite surface and the adsorbed molecules constituting bi- and multilayer Langmuir-B lodgett films can be neglected in simulations of STM images.