title: Adsorbates in a box: titration of substrate electronic states.
abstract: Nanoscale confinement of adsorbed CO molecules in an anthraquinone network on Cu(111) with a pore size of ≈4  nm arranges the CO molecules in a shell structure that coincides with the distribution of substrate confined electronic states. Molecules occupy the states approximately in the sequence of rising electron energy. Despite the sixfold symmetry of the pore boundary itself, the adsorbate distribution adopts the threefold symmetry of the network-substrate system, highlighting the importance of the substrate even for such quasi-free-electron systems.
authors.affiliation: Department of Chemistry, University of California-Riverside, Riverside, California 92521, USA.
authors.forename: Zhihai
authors.initials: Z
authors.lastname: Cheng
authors.forename: Jonathan
authors.initials: J
authors.lastname: Wyrick
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Luo
authors.forename: Dezheng
authors.initials: D
authors.lastname: Sun
authors.forename: Daeho
authors.initials: D
authors.lastname: Kim
authors.forename: Yeming
authors.initials: Y
authors.lastname: Zhu
authors.forename: Wenhao
authors.initials: W
authors.lastname: Lu
authors.forename: Kwangmoo
authors.initials: K
authors.lastname: Kim
authors.forename: T L
authors.initials: TL
authors.lastname: Einstein
authors.forename: Ludwig
authors.initials: L
authors.lastname: Bartels