title: Supramolecular assembly through interactions between molecular dipoles and alkali metal ions.
abstract: Establishing a way to fabricate well-ordered molecular structures is a necessary step toward advancement in organic optoelectronic devices. Here, we propose to use interactions between electric dipoles of molecules and alkali metal ions to form a well-developed homogeneous monolayer of diarylethene molecules on the Cu(111) surface with the aid of NaCl co-deposition. Scanning tunneling microscopy and density functional theory calculation results indicate that the formation of a row-type structure occurs as a result of interactions between the Na(+) ions and the diarylethene molecular dipoles, drastically changing the adsorption configuration from that without Na(+).
authors.affiliation: Surface and Interface Science Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan) http://www.riken.jp/Kimlab; National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan).
authors.forename: Tomoko K
authors.initials: TK
authors.lastname: Shimizu
authors.forename: Jaehoon
authors.initials: J
authors.lastname: Jung
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Imada
authors.forename: Yousoo
authors.initials: Y
authors.lastname: Kim
keywords: density functional calculations; diarylethene; scanning probe microscopy; supramolecular chemistry