2026-04-20 ノースウェスタン大学
＜関連情報＞
- https://news.northwestern.edu/stories/2026/4/cracking-a-long-standing-problem-in-high-entropy-alloy-nanoparticle-synthesis
- https://pubs.acs.org/doi/10.1021/jacs.6c02180
高指数面を有する高エントロピー合金ナノ粒子を合成するための3成分戦略 A Three-Component Strategy for Synthesizing High-Entropy Alloy Nanoparticles with High-Index Facets
Zihao Ye,Dohun Kang,Bo Shen,Jin Huang,Jacob Pietryga,Zifeng Lin,Xinsui Zhang,Christopher M. Wolverton,and Chad A. Mirkin
Journal of the American Chemical Society Published: April 20, 2026
DOI:https://doi.org/10.1021/jacs.6c02180
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 cm2 chips with size and composition control shows generalizability and scalability for materials discovery purposes.
