Reversible Oxidation of Blue Phosphorus Monolayer on Au(111) Academic Article uri icon

abstract

  • Practical applications of two-dimensional (2D) black phosphorus (BP) are limited by its fast degradation under ambient conditions, for which many different mechanisms have been proposed; however, an atomic level understanding of the degradation process is still hindered by the absence of bottom-up methods for the growth of large-scale few-layer black phosphorus. Recent experimental success in the fabrication of single-layer blue phosphorus provides a model system to probe the oxidation mechanism of two-dimensional (2D) phosphorene down to single-layer thicknesses. Here, we report an atomic-scale investigation of the interaction between molecular oxygen and blue phosphorus. The atomic structure of blue phosphorus and the local binding sites of oxygen have been precisely identified using qPlus-based noncontact atomic force microscopy. A combination of low-temperature scanning tunneling microscopy and X-ray photoelectron spectroscopy measurements reveal a thermally reversible oxidation process of blue phosphorus in a pure oxygen atmosphere. Our study clearly demonstrates the essential role of oxygen in the initial oxidation process, and it sheds further light on the fundamental pathways of the degradation mechanism.

authors

  • Zhang, JL
  • Zhao, S
  • Telychko, M
  • Sun, S
  • Lian, X
  • Su, J
  • Tadich, Anton
  • Qi, Dongchen
  • Zhuang, J
  • Zheng, Y
  • Ma, Z
  • Gu, C
  • Hu, Z
  • Du, Y
  • Lu, J
  • Li, Z
  • Chen, W

publication date

  • 2019