Zhang Jia Lin, Zhao Songtao, Sun Shuo, Ding Honghe, Hu Jun, Li Yuliang, Xu Qian, Yu Xiaojiang, Telychko Mykola, Su Jie, Gu Chengding, Zheng Yue, Lian Xu, Ma Zhirui, Guo Rui, Lu Jiong, Sun Zhe, Zhu Junfa, Li Zhenyu, Chen Wei
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore.
Department of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore.
ACS Nano. 2020 Mar 24;14(3):3687-3695. doi: 10.1021/acsnano.0c00822. Epub 2020 Mar 9.
The growth of entirely synthetic two-dimensional (2D) materials could further expand the library of naturally occurring layered solids and provide opportunities to design materials with finely tunable properties. Among them, the synthesis of elemental 2D materials is of particular interest as they represent the chemically simplest case and serve as a model system for exploring the on-surface synthesis mechanism. Here, a pure atomically thin blue phosphorus (BlueP) monolayer is synthesized silicon intercalation of the BlueP-Au alloy on Au(111). The intercalation process is characterized at the atomic scale by low-temperature scanning probe microscopy and further corroborated by synchrotron radiation-based X-ray photoelectron spectroscopy measurements. The evolution of the band structures from the BlueP-Au alloy into Si-intercalated BlueP are clearly revealed by angle-resolved photoemission spectroscopy and further verified by density functional theory calculations.
完全合成的二维（2D）材料的生长可以进一步扩展天然存在的层状固体库，并为设计具有精细可调特性的材料提供机会。其中，元素二维材料的合成特别受关注，因为它们代表了化学上最简单的情况，并作为探索表面合成机制的模型系统。在这里，通过在Au(111)上对蓝磷-金合金进行硅插层，合成了纯原子级薄的蓝磷（BlueP）单层。插层过程通过低温扫描探针显微镜在原子尺度上进行表征，并通过基于同步辐射的X射线光电子能谱测量进一步证实。角分辨光电子能谱清楚地揭示了从蓝磷-金合金到硅插层蓝磷的能带结构演变，并通过密度泛函理论计算进一步验证。
