title: Dynamic double lattice of 1-adamantaneselenolate self-assembled monolayers on Au{111}.
abstract: We report a complex, dynamic double lattice for 1-adamantaneselenolate monolayers on Au{111}. Two lattices coexist, revealing two different binding modes for selenols on gold: molecules at bridge sites have lower conductance than molecules at three-fold hollow sites. The monolayer is dynamic, with molecules switching reversibly between the two site-dependent conductance states. Monolayer dynamics enable adsorbed molecules to reorganize according to the underlying gold electronic structure over long distances, which facilitates emergence of the self-organized rows of dimers. The low-conductance molecules assume a (7 × 7) all-bridge configuration, similar to the analogous 1-adamantanethiolate monolayers on Au{111}. The high-conductance molecules self-organize upon mild annealing into distinctive rows of dimers with long-range order, described by a (6√5 × 6√5)R15° unit cell.
authors.affiliation: California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
authors.forename: J Nathan
authors.initials: JN
authors.lastname: Hohman
authors.forename: Moonhee
authors.initials: M
authors.lastname: Kim
authors.forename: Björn
authors.initials: B
authors.lastname: Schüpbach
authors.forename: Martin
authors.initials: M
authors.lastname: Kind
authors.forename: John C
authors.initials: JC
authors.lastname: Thomas
authors.forename: Andreas
authors.initials: A
authors.lastname: Terfort
authors.forename: Paul S
authors.initials: PS
authors.lastname: Weiss