Discovering Complex Metal Chalcogenide Nanostructures through Nanoreactor-Mediated Synthesis.

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Complex metal chalcogenide nanostructures offer vast potential but are challenging to synthesize.
• Existing methods struggle with precise control over composition, morphology, and crystal structure.

Purpose of the Study:

• To present a generalizable strategy for synthesizing and discovering metal chalcogenide nanostructures.
• To enable tunable stoichiometries, crystal structures, sizes, and spatial arrangements.
• To explore the untapped structural and compositional diversity of multimetal, multichalcogen systems.

Main Methods:

• Utilizing spatially confined reaction environments within scanning probe lithographically prepared phase-separating nanoreactors.
• Systematically tuning nanoreactor chemistry and processing conditions.
• Employing correlative electron microscopy and 4D-STEM for structural and compositional analysis.

Main Results:

• Successfully synthesized a broad spectrum of nanoarchitectures, including textured polycrystals and novel heterostructures.
• Discovered high-entropy metal chalcogenides featuring six elemental components.
• Established a direct link between synthetic design parameters and resulting structural outcomes at the single-particle level.

Conclusions:

• The presented strategy offers a pathway to explore the metal chalcogenide material genome.
• Enables deliberate access to diverse nanoarchitectures with controlled properties.
• Advances the field of complex chalcogenide synthesis and discovery.