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Thickness dependent thermal stability of 2D gallenene
Krista G Steenbergen1, Nicola Gaston
1The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand. kgsteen@gmail.com.
Chemical Communications (Cambridge, England)
|June 28, 2019
Summary
Two-dimensional gallium, or gallenene, shows enhanced thermal stability compared to its bulk form. This study reveals the structural properties and origin of this surprising stability in 2D gallium materials.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Gallium has a long history of interest regarding its thermodynamic stability and structures.
- Two-dimensionality and surface stabilization are suggested to be important for gallium's bulk and nanostructures.
- Properties and stability of different 2D gallium structures remain unexplored.
Purpose of the Study:
- Investigate the structure and thermal stability of freestanding bilayer and trilayer gallenene.
- Explore the properties of two-dimensional gallium.
- Understand the origin of thermal stability in 2D gallium.
Main Methods:
- Extensive density functional theory (DFT) simulations were employed.
- Investigated freestanding bilayer and trilayer gallenene structures.
- Analyzed thermal stability of the 2D gallium forms.
Main Results:
- Reducing bulk gallium to two dimensions enhances its thermal stability.
- Discovered the origin of this enhanced thermal stability in gallenene.
- Characterized the structure and stability of bilayer and trilayer gallenene.
Conclusions:
- Two-dimensional gallenene exhibits superior thermal stability over bulk gallium.
- The study elucidates the fundamental reasons behind the enhanced stability of 2D gallium.
- Provides insights into the structural properties of novel 2D materials.
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