Related Experiment Video
Updated: Feb 15, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.4K
Electronic Structure and Band Gap Engineering of Two-Dimensional Octagon-Nitrogene
Wanxing Lin1, Jiesen Li2, Weiliang Wang1
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, P. R. China.
Scientific Reports
|January 28, 2018
Summary
A novel nitrogen allotrope, octagon-nitrogene (ON), is dynamically stable and maintains integrity at room temperature. This 2D material exhibits tunable electronic properties, showing potential for advanced electronics and spintronics applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Chemistry
Background:
- Previous theoretical studies predicted a new nitrogen phase, octagon-nitrogene (ON).
- Further investigation into the stability and electronic properties of this novel ON phase is warranted.
Purpose of the Study:
- To comprehensively investigate the dynamic stability and electronic band structure of octagon-nitrogene (ON).
- To explore the influence of external stimuli, such as strain and electric fields, on ON's electronic properties.
- To assess the potential applications of ON in various technological fields.
Main Methods:
- Phonon dispersion calculations to determine dynamic stability.
- Ab initio molecular dynamic simulations to assess thermal stability.
- Density functional theory (DFT) to analyze electronic band structure and properties.
Main Results:
- Octagon-nitrogene (ON) exhibits dynamic stability with no imaginary phonon modes.
- ON is stable up to room temperature, forming ripples similar to graphene.
- Single-layer ON is a 2D wide-gap semiconductor with an indirect band gap of 4.7 eV, tunable via stacking, strain, and electric fields.
- Insulator-to-metal transitions can be induced by biaxial tensile strain or perpendicular electric fields.
Conclusions:
- Octagon-nitrogene (ON) is a dynamically and thermally stable 2D material.
- Its electronic band gap is highly tunable, enabling potential insulator-to-metal transitions.
- ON shows significant promise for applications in electronics, semiconductors, optics, and spintronics.
Related Concept Videos
02:35Band Theory
17.3K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.3K
02:28Electronic Structure of Atoms
29.0K
An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
29.0K
01:49The Nitrogen Cycle
60.8K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
60.8K
01:07Radicals: Electronic Structure and Geometry
5.1K
This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
5.1K
01:37Gap Junctions
57.4K
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
57.4K
01:27Gap Junctions
9.8K
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
9.8K