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Phosphorus Pentamers: Floating Nanoflowers form a 2D Network

机译：磷五聚磷：浮动纳米割草机形成2D网络

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摘要

An experimental investigation of a new polymorphic 2D single layer of phosphorus on Ag(111) is presented. The atomically-resolved scanning tunneling microscopy images show a new 2D material composed of freely-floating phosphorus pentamers organized into a 2D layer, where the pentamers are aligned in close-packed rows. The scanning tunneling spectroscopy measurements reveal a semiconducting character with a band gap of 1.20 eV. This work presents the formation at low temperature of a new polymorphic 2D phosphorus layer composed of a floating 2D pentamer structure. The smooth curved terrace edges and a lack of any clear crystallographic orientation with respect to the Ag(111) substrate at room temperature indicates a smooth potential energy surface that is reminiscent of a liquid-like growth phase. This is confirmed by density functional theory calculations that find a small energy barrier of only 0.17 eV to surface diffusion of the pentamers (see Supporting Information). The formation of extended, homogeneous domains is a key ingredient to opening a new avenue to integrate this new 2D material into electronic devices.
机译：介绍了AG（111）上新多态性2D单层磷的实验研究。原子分辨扫描隧穿显微镜图像显示由组织成2D层的自由漂浮的磷五聚体组成的新的2D材料，其中五聚体在近填充的行中对齐。扫描隧道光谱测量尺寸揭示了具有1.20 eV的带隙的半导体特征。该工作介绍了由浮动2D五聚体结构组成的新多态性2D磷层的低温的形成。平滑弯曲的露台边缘和在室温下相对于Ag（111）衬底的缺乏任何透明的晶体取向表示是光滑的电位能表面，其使液体状生长相热。这是通过密度函数理论计算的确认，该计算仅找到0.17 eV的小型能量屏障，以对五个排质性的表面扩散（参见支持信息）。延伸的均匀域的形成是打开新途径以将这种新的2D材料集成到电子设备中的关键成分。

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