Epitaxy of organic crystal films: Phenanthrene on potassium acid phthalate

作者：Graswinckel W Sander; van den Bruele Fieke J; van Enckevort Willem J P^*; Vlieg Elias

来源：Crystal Growth & Design, 2007, 7(2): 243-249.

DOI：10.1021/cg0602257

The growth of epitaxial layers of phenanthrene from the vapor on cleaved (010) potassium acid phthalate (KAP) single-crystal substrates is reported. Using a growth cell designed for precise control of supersaturation and substrate temperature, the deposition process was followed in situ using optical microscopy. After epitaxial three-dimensional (3D) nucleation at high supersaturation and subsequent growing together of the nuclei at low supersaturation, closed crystalline phenanthrene layers were obtained. The produced crystal film was composed of four orientational domains, being two pairs of enantiomorphs 180 degrees rotated with respect to each other. The epitaxy is explained by a structural match at the KAP (010)-phenanthrene (001) contact faces, which are both terminated by a pseudo-hexagonal pattern of more or less perpendicular hexagonal aromatic rings.

• 出版日期2007-2