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.
J Chem Phys. 2012 Jan 14;136(2):024701. doi: 10.1063/1.3676087.
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.
C(60) 分子在沉积到保持在 400 K 的 Pt(111) 支撑 FeO 层上时，在分子间相互作用的控制下组装成密堆积层。从相应的高分辨率扫描隧道显微镜 (STM) 图像中，揭示了一种由分子间相互作用稳定的 C(60)分子取向有序性，其结构为 C(60)/FeO(111)-(√133 × √133) R17.5°，并通过 C(60)最近邻距离与底层氧层晶格之间的协调性确定。此外，由于底层 FeO 层不均匀分布的功函数，C(60)分子的电子态会周期性地调制，从而导致明亮-暗 STM 对比度。此外，相对于 C(60)原始晶格，确定了一种重合晶格有序性，即 8×8 超晶格，它叠加在底层 FeO 层的 3×3 莫尔晶格上。
