Polyelemental Nanoparticle Synthesis Enabled by Noncontact Metallothermic Reactions.

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Combinatorial synthesis and high-throughput screening accelerate materials discovery.
• Nanomaterials present unique challenges in synthesis and structure-function relationships compared to bulk materials.
• Vast design spaces and synthetic complexities hinder efficient nanomaterial exploration.

Purpose of the Study:

• To develop an efficient method for synthesizing diverse nanomaterial libraries.
• To overcome limitations in current nanomaterial discovery approaches.
• To enable the exploration of complex material compositions not achievable with existing techniques.

Main Methods:

• Integration of noncontact metallothermic reactions with polymer pen lithography (PPL) and scanning probe block copolymer lithography (SPBCL).
• Synthesis of nanoscale feature libraries containing millions of distinct compositions.
• Utilized nine representative p-, d-, and f-block elements for diverse metal combinations.

Main Results:

• Demonstrated successful synthesis of diverse metal combinations across p-, d-, and f-block elements.
• Studied the reaction pathway using Al_0.95Sc_0.05 as a model system.
• Validated scalability by preparing a 2 × 2 cm² glassy carbon chip for electrocatalysis.

Conclusions:

• The developed approach enables efficient synthesis and exploration of complex nanomaterial compositions.
• This substrate-general method (SiN_x, glassy carbon, amorphous SiO₂) advances systematic nanomaterial discovery.
• Facilitates the creation of novel nanomaterials with potentially unique structure-function relationships.