title: A homomolecular porous network at a Cu(111) surface.
abstract: Anthraquinone molecules self-assemble on a Cu(111) surface into a large two-dimensional honeycomb network (square root of 304 x square root of 304)R23 degrees with pore diameters of approximately 50 A. The spontaneous formation of a pattern containing pores roughly five times larger than the size of the constituent molecules is unprecedented. The network originates from a delicate balance between substrate-mediated repulsion and intermolecular attraction involving an unusual chemical motif: hydrogen bonding between a carbonyl oxygen and an aromatic hydrogen atom. Substrate-mediated long-range adsorbate-adsorbate repulsion has been observed on anisotropic surfaces and in the context of the absence of pattern formation. Its applicability for the design of tailored molecular films is explored here.
authors.affiliation: Pierce Hall, University of California, Riverside, CA 92521, USA.
authors.forename: Greg
authors.initials: G
authors.lastname: Pawin
authors.forename: Kin L
authors.initials: KL
authors.lastname: Wong
authors.forename: Ki-Young
authors.initials: KY
authors.lastname: Kwon
authors.forename: Ludwig
authors.initials: L
authors.lastname: Bartels