Liquid metal for high-entropy alloy nanoparticles synthesis
Liquid metal for high-entropy alloy nanoparticles synthesis
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DOI：
10.1038/s41586-023-06082-9
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发表时间：
2023-06
期刊：
影响因子：
64.8
通讯作者：
Guanghui Cao;Jingjing Liang;Zenglong Guo;Kena Yang;G. Wang;Huiliu Wang;Xuhao Wan;Zeyuan Li;Yijia Bai;Yile Zhang;Junlin Liu;Yanpeng Feng;Zhenying Zheng;Cai Lu;G. He;Zeyou Xiong;Ze Liu;Shengli Chen;Yuzheng Guo;Mengqi Zeng;Junhao Lin;L. Fu
中科院分区：
文献类型：
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作者：
Guanghui Cao;Jingjing Liang;Zenglong Guo;Kena Yang;G. Wang;Huiliu Wang;Xuhao Wan;Zeyuan Li;Yijia Bai;Yile Zhang;Junlin Liu;Yanpeng Feng;Zhenying Zheng;Cai Lu;G. He;Zeyou Xiong;Ze Liu;Shengli Chen;Yuzheng Guo;Mengqi Zeng;Junhao Lin;L. Fu
高熵合金纳米粒子(HEA-NPs)在功能材料方面显示出巨大的潜力。然而，到目前为止，已实现的高熵合金仅限于相似元素的调色板，这极大地阻碍了材料设计、性能优化和不同应用的机理探索。在这里，我们发现液态金属与其他元素的负混合热可以提供一个稳定的热力学条件，作为理想的动态混合储存库，从而实现在温和的反应条件下合成多种金属元素的HEA-NPs。所涉及的元素具有广泛的原子半径(1.24-1.97 ä)和熔点(303-3,683 K)。我们还通过混合热调实现了纳米粒子的精确结构。此外，现场捕捉到了从液态金属到结晶HEA-NPs的实时转变过程，证实了合金化过程中的动态裂变-融合行为。
High-entropy alloy nanoparticles (HEA-NPs) show great potential as functional materials, –. However, thus far, the realized high-entropy alloys have been restricted to palettes of similar elements, which greatly hinders the material design, property optimization and mechanistic exploration for different applications,. Herein, we discovered that liquid metal endowing negative mixing enthalpy with other elements could provide a stable thermodynamic condition and act as a desirable dynamic mixing reservoir, thus realizing the synthesis of HEA-NPs with a diverse range of metal elements in mild reaction conditions. The involved elements have a wide range of atomic radii (1.24–1.97 Å) and melting points (303–3,683 K). We also realized the precisely fabricated structures of nanoparticles via mixing enthalpy tuning. Moreover, the real-time conversion process (that is, from liquid metal to crystalline HEA-NPs) is captured in situ, which confirmed a dynamic fission–fusion behaviour during the alloying process.