PREPARATION OF THIN CRYSTALLINE FILMS OF ORGANIC-COMPOUNDS BY THE LANGMUIR-BLODGETT TECHNIQUE

Preparation of specimens for transmission electron microscopy and elec tron diffraction by the Langmuir technique is reported. Thin crystalli ne films of nonpolar organic compounds [paraffin and tetra(alkanoyloxy )hydroquinone] are obtained and studied as examples. The Langmuir tech nique has advantages over the well-established methods used in prepara tion of thin organic crystalline films, because it allows the control of thickness, yields textured films with a better orientation of the t exture axis, and results in a high homogeneity of the specimen obtaine d.