Design Guidelines for Two-Dimensional Transition Metal Dichalcogenide Alloys

Area of Science:

• Materials Science
• Nanotechnology
• Computational Chemistry

Background:

• Two-dimensional (2D) materials, particularly transition metal dichalcogenides (TMDs), are key in nanotechnology.
• Alloying strategies, successful for bulk materials, are needed for 2D materials to engineer applications.

Purpose of the Study:

• To systematically analyze the phase behavior of substitutional 2D alloys in the TMD family.
• To extend alloying strategies to novel 2D materials for tailored properties.

Main Methods:

• Computational screening of configurational energy landscapes using First-Principles calculations.
• Quantification of phase behavior using a metastability metric.
• Generation of Pettifor maps for chemical space analysis.

Main Results:

• Systematic analysis of phase behavior for 2D TMD alloys on both metal and chalcogenide sites.
• Identification of trends across chemical spaces using Pettifor maps.
• Guidelines for targeted computational analysis of stable compounds.

Conclusions:

• Pettifor maps serve as a starting point for rational search strategies in phase space.
• Results guide the synthesis of binary metal 2D TMDs alloys.
• This work facilitates the development of 2D materials for engineering applications.