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DOE OSTI · 3028335

A Three-Component Strategy for Synthesizing High-Entropy Alloy Nanoparticles with High-Index Facets

Ye, Zihao [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000306165650)·Kang, Dohun [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000159656432)·Shen, Bo [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000180117134)·Huang, Jin [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000228822634)·Pietryga, Jacob [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)]·Lin, Zifeng [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)]·Zhang, Xinsui [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)]·Wolverton, Christopher M. [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:000000032248474X)·Mirkin, Chad A. [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000266347627)
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Abstract

Controlling the shapes and, more importantly, exposed facets (high-index facets (HIFs), especially) of high-entropy alloy (HEA) nanoparticles is not yet possible. Herein, a three-component synthetic strategy for obtaining tetrahexahedral (THH)-shaped HIF-HEA nanoparticles through a combined alloying-dealloying strategy and liquid-metal mediation process is reported. Metal precursors are first alloyed with Ga to form multielemental nanoparticles and then alloyed with a volatile metal. Selectively dealloying the volatile metal from the nanoparticles is used to regulate their surface energies; the Ga stabilizes the HEA phase, and the trace element stabilizes the HIFs, resulting in THH-shaped HEA nanoparticles (seven different types) with {210} HIFs. Finally, nanoparticle megalibraries containing millions of THH-shaped HIF-HEAs on 4 cm 2 chips with size and composition control shows generalizability and scalability for materials discovery purposes.

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Ye, Zihao [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000306165650), Kang, Dohun [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000159656432), Shen, Bo [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000180117134), Huang, Jin [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000228822634), Pietryga, Jacob [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)], Lin, Zifeng [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)], Zhang, Xinsui [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)], Wolverton, Christopher M. [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:000000032248474X), Mirkin, Chad A. [Northwestern Univ., Evanston, IL (United States); International Institute for Nanotechnology, Evanston, IL (United States)] (ORCID:0000000266347627). 2026-04-20. A Three-Component Strategy for Synthesizing High-Entropy Alloy Nanoparticles with High-Index Facets. https://doi.org/10.1021/jacs.6c02180

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