Evolution of Low-Dimensional Phosphorus Allotropes on Ag(111),Chemistry of Materials

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Evolution of Low-Dimensional Phosphorus Allotropes on Ag(111)
Chemistry of Materials ( IF 7.2 ) Pub Date : 2022-11-09 , DOI: 10.1021/acs.chemmater.2c02812
Yihe Wang _{1,

2} , Chenqiang Hua _{3,

4} , Shuo Sun ₅ , Jian Gou ₅ , Sisheng Duan ₅ , Andrew T. S. Wee ₅ , Miao Zhou _{3,

4} , Yu Li Huang ₁ , Wei Chen _{1,

2,

5,

6}

Affiliation

Elemental two-dimensional (2D) materials exhibiting intriguing properties have great potential applications in next-generation electronics. However, controlling single-phase synthesis might be challenging due to the existence of various allotropes with comparable stability. Here, low-dimensional phosphorus (P) is used as a prototype for the understanding of the competition among a series of 0D–2D allotropes upon adsorption. With a combination of theoretical calculations and scanning tunneling microscopy, we find that the formation of P allotropes significantly depends on the bond angle, coordination number, and atomic density. As a result, P atoms tend to form black phosphorene (BP)-like chains and pentamer molecules at low atomic density and 2D buckling blue phosphorene at high density. In particular, a trigonal nanoribbon-like phase is observed with the confinement of the BP-like chains. The comprehensive understanding of the evolution of the elemental allotropes in low dimension could provide fundamental guidance for the construction of polymorphic quantum materials with novel functionalities.

中文翻译：

Ag(111) 上低维磷同素异形体的演化

具有有趣特性的元素二维 (2D) 材料在下一代电子产品中具有巨大的潜在应用。然而，由于存在具有相当稳定性的各种同素异形体，控制单相合成可能具有挑战性。在这里，低维磷 (P) 用作原型，以了解一系列 0D-2D 同素异形体在吸附时的竞争。结合理论计算和扫描隧道显微镜，我们发现 P 同素异形体的形成在很大程度上取决于键角、配位数和原子密度。因此，P 原子倾向于在低原子密度下形成黑色磷烯 (BP) 样链和五聚体分子，在高密度下形成二维屈曲蓝色磷烯。尤其是，在类 BP 链的限制下观察到三角纳米带状相。全面了解低维元素同素异形体的演化可以为构建具有新功能的多晶型量子材料提供基础指导。

更新日期：2022-11-09

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