Neighborhoods and functionality in metals

Area of Science:

• Computational Materials Science
• Solid-State Chemistry
• Metallurgical Analysis

Background:

• Organic chemistry extensively uses functional groups to understand molecular behavior.
• Metallic materials are typically not analyzed with functional group concepts due to delocalized electron assumptions.
• Computational chemistry methods often overlook metallic material functionality.

Purpose of the Study:

• To propose a novel methodology for recovering functional groups in metallic materials.
• To enable the application of chemical concepts to metallic materials and metallurgical phenomena.
• To characterize and decompose metallic structures into chemically meaningful neighborhoods.

Main Methods:

• Characterizing atomic neighborhoods by observing the evolution of Bader energy as a function of cluster size.
• Analyzing the energy perspective of functional groups within metallic structures.
• Assessing generalizability across different crystalline materials and structural defects (grain boundaries, dislocations).

Main Results:

• A methodology is presented to identify functional groups in metals from an energy perspective.
• Metallic structures can be conceptually decomposed into localized, energy-dependent chemical neighborhoods.
• A universal neighborhood size of approximately 2-3 atomic diameters was observed across various materials and defects.

Conclusions:

• The proposed energy-based approach successfully recovers functional group concepts in metallic materials.
• This method allows for the localization of energy-dependent properties within metallic structures.
• Opens avenues for applying chemical concepts, like orbital methods, to diverse metallurgical phenomena.