title: Alignment-induced epitaxial transition in organic-organic heteroepitaxy.
abstract: We report the epitaxial growth of thin films of a small organic molecule (pentacene) on polymer substrates with controllable photoalignment over a wide range. The pentacene molecular plane exhibited a distinct orientational change from parallel to perpendicular relative to the polymer chain with increasing substrate polymer alignment. Each orientation consists of twinlike domains. Such characteristics reveal a unique alignment-induced epitaxial transition controlled by the subtle balance of weak interactions, showing a promising approach for tuning the characteristics of organic semiconductor based electronic devices.
authors.affiliation: Organic Nanomaterials Centre, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. dong.guo@epfl.ch
authors.forename: Dong
authors.initials: D
authors.lastname: Guo
authors.forename: Kenji
authors.initials: K
authors.lastname: Sakamoto
authors.forename: Kazushi
authors.initials: K
authors.lastname: Miki
authors.forename: Susumu
authors.initials: S
authors.lastname: Ikeda
authors.forename: Koichiro
authors.initials: K
authors.lastname: Saiki