Multitribe evolutionary search for stable Cu-Pd-Ag nanoparticles using neural network models

Area of Science:

• Computational Materials Science
• Nanotechnology
• Bio-inspired Computing

Background:

• Identifying stable nanoparticle ground states is crucial for materials design.
• Traditional methods for finding nanoparticle structures can be computationally expensive and inefficient.
• Accurate modeling of interatomic interactions in multielement systems remains a challenge.

Purpose of the Study:

• To develop and validate an accelerated approach for identifying nanoparticle ground states.
• To enhance the efficiency of searching for stable nanocluster configurations.
• To accurately describe interactions in multielement nanoparticle systems.

Main Methods:

• Utilized two bio-inspired algorithms: symbiotic co-evolution of nanoclusters and a neural network with stratified training.
• Applied the method to search for stable elemental, binary (Cu-Pd-Ag), and ternary (Cu-Pd-Ag) clusters.
• Validated results using density functional theory (DFT) calculations.

Main Results:

• Symbiotic co-evolution significantly improved search efficiency for nanoclusters across various sizes.
• The neural network accurately described interactions in multielement systems.
• Identified candidate structures with consistently lower energies compared to traditional interatomic potentials at the DFT level.

Conclusions:

• The proposed bio-inspired and neural network approach accelerates nanoparticle ground state identification.
• This method offers a more accurate and efficient alternative to traditional techniques for materials discovery.
• The findings pave the way for designing novel nanomaterials with desired properties.