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Updated: Dec 18, 2025

Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials

Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials

Published on: January 5, 2019

Nitrogen in black phosphorus structure.

Cheng Ji^1,2, Adebayo A Adeleke³, Liuxiang Yang¹

¹Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China.

Science Advances

|June 16, 2020

Summary

This summary is machine-generated.

Researchers synthesized black phosphorus-structured nitrogen, a novel two-dimensional material, under extreme conditions. This discovery opens avenues for exploring new high-energy-density nitrogen materials.

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Published on: November 22, 2016

Area of Science:

Materials Science
High-Pressure Physics
Solid-State Chemistry

Background:

Group V elements in black phosphorus structure exhibit unique properties.
Nitrogen, as the first Group V element, has not previously been synthesized in this structure.

Purpose of the Study:

To synthesize and characterize black phosphorus-structured nitrogen.
To explore novel two-dimensional nitrogen materials.

Main Methods:

Synthesis at 146 GPa and 2200 K.
In situ characterization using synchrotron X-ray diffraction and Raman spectroscopy during decompression.
Analysis of structural transformations and bonding.

Main Results:

Successful synthesis of metastable black phosphorus-structured nitrogen.
Nitrogen transformed from molecular to extended single-bonded structure via gauche and trans conformations.
Observed strong anisotropy and high Raman intensities in two A_g modes.

Conclusions:

This synthesis provides a foundation for developing novel high-energy-density nitrogen materials.
Establishes a new direction for research into two-dimensional nitrogen allotropes.