Transformative Heterointerface Evolution and Plasmonic Tuning of Anisotropic Trimetallic Nanoparticles

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Multicomponent nanoparticles (NPs) offer tunable properties but controlled synthesis of complex structures, especially anisotropic ones with three or more components, remains challenging.
• Tailoring NP structure and properties is crucial for advanced applications in optics, energy, catalysis, and biotechnology.

Purpose of the Study:

• To develop a novel method for synthesizing well-defined, anisotropic multicomponent nanoparticles with three or more metallic components.
• To demonstrate precise control over the structural and optical properties of these nanoparticles, particularly their plasmonic behavior.

Main Methods:

• A transformative heterointerface evolution (THE) method was developed, utilizing polymer and galvanic replacement reactions.
• This method enables the formation and tuning of gold-copper-silver multimetallic anisotropic nanoparticles (MAPs) with controlled configurations and junction geometries.

Main Results:

• The THE method successfully produced MAPs with well-defined structural order and tunable particle/junction geometry.
• These MAPs exhibit highly tunable optical properties, integrating multiple surface plasmon resonance (SPR) peaks across UV, visible, and near-infrared ranges.
• Fine control over heteronanojunctions allowed for precise tuning of SPR properties.

Conclusions:

• The developed THE method provides a versatile platform for fabricating highly tailored multicomponent nanohybrids.
• The findings open new avenues for realizing advanced applications of these nanostructures in optics, energy, catalysis, and biotechnology.