title: Robust Sierpiński triangle fractals on symmetry-mismatched Ag(100).
abstract: Sierpiński triangle fractals were constructed on both Ag(111) and symmetry-mismatched fourfold Ag(100) surfaces through chemical reaction between H3PH molecules and Fe atoms under vacuum. Density functional theory calculations revealed that the fractals were stabilized by the strong coordination interaction between Fe and O atoms. In comparison, pure H3PH molecules formed fractals via moderately strong hydrogen bonds only on Ag(111), not on Ag(100).
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn.
authors: Xue
authors: X
authors: Zhang
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn.
authors: Na
authors: N
authors: Li
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn.
authors: Liwei
authors: L
authors: Liu
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn.
authors: Gaochen
authors: G
authors: Gu
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn.
authors: Chao
authors: C
authors: Li
authors: CEMES-CNRS, Boîte Postale 94347, 31055 Toulouse, France.
authors: Hao
authors: H
authors: Tang
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn.
authors: Lianmao
authors: L
authors: Peng
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn and Beida Information Research (BIR), Tianjin 300457, China.
authors: Shimin
authors: S
authors: Hou
authors: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China. yongfengwang@pku.edu.cn and Beida Information Research (BIR), Tianjin 300457, China.
authors: Yongfeng
authors: Y
authors: Wang