期刊
LANGMUIR
卷 36, 期 8, 页码 1985-1992出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.9b03392
关键词
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资金
- ONR MURI grant
- NSF Scalable Nanomanufacturing project [1635221]
- MRI-R2 grant from the National Science Foundation [DMR-0959470]
- [NSF-DMR-1809439]
Homogeneously mixing multiple metal elements within a single particle may offer new material property functionalities. High entropy alloys (HEAs), nominally defined as structures containing five or more well-mixed metal elements, are being explored at the nanoscale, but the scale-up to enable their industrial application is an extremely challenging problem. Here, we report an aerosol droplet-mediated technique toward scalable synthesis of HEA nanoparticles with atomic-level mixing of immiscible metal elements. An aqueous solution of metal salts is nebulized to generate similar to 1 mu m aerosol droplets, which when subjected to fast heating/quenching result in decomposition of the precursors and freezing-in of the zero-valent metal atoms. Atomic-level resolution scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy analysis reveals that all metal elements in the nanoparticles are homogeneously mixed at the atomic level. We believe that this approach offers a facile and flexible aerosol droplet-mediated synthesis technique that will ultimately enable bulk processing starting from a particulate HEA.
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