EFFECT OF GROWTH TEMPERATURE AND SUBSTRATE MATERIALS ON EPITAXIAL-GROWTH OF CORONENE

Epitaxial growth of coronene (C24H12) was studied on substrates having no dangling bonds, such as hydrogen-terminated Si(lll), MoS2, MoTe2, and muscovite by using reflection high-energy electron diffraction. It was found that the sticking coefficient and the maximum thickness of the epitaxial films are strongly dependent on the substrate materials as well as on the growth temperature. The effectiveness of molecular m echanics calculation was examined by comparing the calculated stabiliz ation energies with the experimental results. Importance of the electr onic structure of substrates has been revealed and its effect was esti mated quantitatively using the Lifshitz theory. The tendency that the interfacial dispersion force is stronger for smaller band gap material s has been shown from theoretical consideration. (C) 1998 American Ins titute of Physics.