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Related Concept Videos

Energy Bands in Solids01:01

Energy Bands in Solids

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Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
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Engineering Grain Boundaries in Two-Dimensional Electronic Materials.

Seong-Jun Yang1,2, Min-Yeong Choi1,2, Cheol-Joo Kim1,2

  • 1Center for Epitaxial van der Waals Quantum Solids, Institute for Basic Science (IBS), Pohang, Gyeongbuk, 37673, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|July 1, 2022
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Summary
This summary is machine-generated.

Engineering the boundaries of 2D materials allows for property tuning and advanced devices. Current techniques face challenges in reproducibility and scalability for widespread application.

Keywords:
dislocationgrain boundariesstacking orderstilt boundariestwist boundariestwo-dimensional materialsvan der Waals structures

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Two-dimensional (2D) materials offer unique properties tunable via structural engineering.
  • Controlling boundary structures, such as grain boundaries, is key to unlocking advanced functionalities.
  • Current methods for fabricating engineered boundaries lack reproducibility and scalability.

Purpose of the Study:

  • To review emergent properties arising from engineered grain boundaries in 2D materials.
  • To survey existing techniques for controlling 2D material boundary structures.
  • To identify challenges and future directions for scalable and reproducible boundary engineering.

Main Methods:

  • Literature review of emergent properties in 2D materials with varied grain boundaries.
  • Analysis of current structural engineering techniques for 2D materials.
  • Discussion of challenges in scalable and reproducible structure control.

Main Results:

  • 2D materials exhibit diverse emergent properties influenced by grain boundary characteristics.
  • Various techniques exist for controlling boundary structures, but with limitations.
  • Significant challenges remain in achieving reproducible and scalable control over these structures.

Conclusions:

  • Engineered boundaries in 2D materials hold great promise for novel devices.
  • Further advancements in fabrication techniques are crucial for realizing this potential.
  • Future research should focus on scalable and reproducible methods for boundary structure control.