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Related Experiment Video

Updated: Jan 28, 2026

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

Interface and heterostructure design in polyelemental nanoparticles.

Peng-Cheng Chen^1,2, Mohan Liu¹, Jingshan S Du^1,2

¹Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.

Science (New York, N.Y.)

|March 2, 2019

Summary

This summary is machine-generated.

Researchers developed design rules for creating complex nanomaterial heterostructures. This work advances the synthesis of multielement nanoparticles for applications in catalysis, plasmonics, and electronics.

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Area of Science:

Materials Science
Nanotechnology
Physical Chemistry

Background:

Heterostructure nanomaterials are crucial for catalysis, plasmonics, and electronics.
Synthesizing multielement nanoparticles is advancing, yet understanding phase formation and interface design remains limited.

Purpose of the Study:

To investigate the formation of thermodynamic phases in palladium-tin alloyed nanoparticles.
To establish design principles for synthesizing specific heterostructures in polyelemental nanoparticle systems.

Main Methods:

Synthesis of nanoparticles with up to seven elements.
Characterization of triphase heterostructures with two- or three-interface architectures.
Utilizing density functional theory (DFT) calculations and experimental data to analyze surface and interfacial energies.

Main Results:

Successfully synthesized nanoparticles forming complex mixed-composition phases.
Observed formation of triphase heterostructures with defined interface architectures.
Established quantitative relationships between composition, structure, and interfacial energies.

Conclusions:

Developed predictive design rules for engineering polyelemental nanoparticle heterostructures.
Demonstrated the capability to create tetraphase nanoparticles with multiple junctions.
Advanced the fundamental understanding of phase formation and interface control in complex nanomaterials.