Epitaxial Growth of Condensed Aromatic Polycyclic Compounds

Abstract

THE epitaxial growth of thin crystalline films vacuum evaporated on a surface of single crystal is a very common phenomenon nowadays. However, the materials used so far have been mostly restricted only to metals or inorganic compounds. Recently, being concerned with the semiconductor behaviour. vacuum-evaporated films of various kinds of condensed aromatic polycyclic compounds have been often dealt with by many investigators¹. In the course of electron microscopy and diffraction study of vacuum-evaporated films of those organic materials including metal phthalocyanine, anthanthrone, indanthrone, flavanthrone, pyranthrone, violanthrone and iso-violanthrone, we have found that the epitaxial growth also preferably occurred when those materials were condensed on to a cleavage surface of muscovite crystal, the temperature of which had been raised to an appropriate extent.