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Updated: Sep 3, 2025

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Atomically Sharp, Closed Bilayer Phosphorene Edges by Self-Passivation.

Sol Lee1,2, Yangjin Lee1,2, Li Ping Ding3,4

  • 1Department of Physics, Yonsei University, Seoul 03722, South Korea.

ACS Nano
|July 29, 2022
PubMed
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This summary is machine-generated.

Edge structures in two-dimensional crystals are crucial. Researchers discovered that bilayer phosphorene

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Edge structures of two-dimensional crystals significantly impact their properties and synthesis.
  • Atomic-scale edge features like reconstruction and contamination are complex and require detailed study.
  • Understanding edge configurations is vital for controlling material properties and applications.

Purpose of the Study:

  • To investigate the atomic-scale edge structures and reconstruction behavior in bilayer phosphorene.
  • To identify stable edge configurations and their formation mechanisms.
  • To provide insights for the synthesis and application of phosphorene nanostructures.

Main Methods:

  • In situ transmission electron microscopy (TEM) of phosphorene/graphene specimens at elevated temperatures.
Keywords:
aberration-corrected TEM imagingatomic reconstructioncrystalline edge structurenanoribbonphosphorene

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  • First-principles calculations to determine edge stability and formation energy.
  • TEM image analysis under various tilting and defocus conditions.

    • Main Results:

    • The bilayer zigzag (ZZ) edge is the most stable configuration under electron beam irradiation.
    • Bilayer ZZ edges undergo reconstruction to form closed, self-passivated structures.
    • Calculations confirm low formation energy and high stability of the closed bilayer ZZ edge.

    Conclusions:

    • Atomically sharp closed ZZ edges in bilayer phosphorene nanoribbons were successfully fabricated.
    • The identified reconstruction mechanism enhances edge stability against electron beam damage.
    • Findings advance the fundamental understanding of phosphorene's synthesis, degradation, and applications.