title: Molecular orientation and lattice ordering of C60 molecules on the polar FeO/Pt(111) surface.
abstract: C(60) molecules assemble into close packing layer under the domination of the intermolecular interaction when deposited onto Pt(111)-supported FeO layer kept at 400 K. From corresponding high resolution scanning tunneling microscopy (STM) image, a kind of C(60) molecular orientational ordering stabilized by the intermolecular interaction is revealed as C(60)/FeO(111)-(√133 × √133) R17.5° structure and determined from the commensurability between the C(60) nearest-neighbor distance and the lattice of the underlying oxygen layer. Moreover, due to the inhomogeneously distributed work function of the underlying FeO layer, the C(60) molecular electronic state is periodically modulated resulting in a bright-dim STM contrast. In addition, one coincidence lattice ordering is determined as 8 × 8 superstructure with respect to the C(60) primitive cell, which overlays a 3 × 3 moiré cell of the underlying FeO layer.
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China. zhqin@wipm.ac.cn
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Qin
authors.forename: Cunding
authors.initials: C
authors.lastname: Liu
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.forename: Qinmin
authors.initials: Q
authors.lastname: Guo
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Yu
authors.forename: Gengyu
authors.initials: G
authors.lastname: Cao
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D037741:Fullerenes / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D005290:Ferric Compounds; D037741:Fullerenes; C000499:ferric oxide; D010984:Platinum; C069837:fullerene C60