LANGMUIR-BLODGETT-FILMS BUILT-UP WITH 2-COMPONENT MONOLAYERS

X-ray diffraction technique have been used extensively in order to det ermine the structural properties of Langmuir-Blodgett films. In this w ork we employed this technique to investigate the structure of mixed L B films, starting from very simple mixtures (i.e., mixture of long-cha in fatty acid salts) to more complicated ones, containing protein frag ments. The obtained results show a variety of behaviours and demonstra te that different molecular packing are possible, even in the same mol ecular system, in connection with small changes in the experimental co nditions. In particular it appeared that a real mixing of the two type s of molecules involved is not always possible.