Multi-principal elemental intermetallic nanoparticles synthesized via a disorder-to-order transition.
Multi-principal elemental intermetallic nanoparticles synthesized via a disorder-to-order transition.
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DOI：
10.1126/sciadv.abm4322
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发表时间：
2022-01-28
期刊：
影响因子：
13.6
通讯作者：
Hu L
中科院分区：
文献类型：
--
作者：
Cui M;Yang C;Hwang S;Yang M;Overa S;Dong Q;Yao Y;Brozena AH;Cullen DA;Chi M;Blum TF;Morris D;Finfrock Z;Wang X;Zhang P;Goncharov VG;Guo X;Luo J;Mo Y;Jiao F;Hu L
纳米级多主元金属间化合物（MPEI）可以提供活性高表面积材料的广泛且可调节的组成空间，具有催化和磁性等潜在应用。然而，MPEI 纳米颗粒的制造具有挑战性，因为颗粒在退火过程中容易生长/团聚或相分离。在这里，我们展示了一种从无序到有序的相变方法，该方法能够合成超小（4 至 5 nm）且稳定的 MPEI 纳米颗粒（最多八种元素）。我们仅应用 5 分钟的焦耳加热来促进纳米颗粒相变为 L10 金属间结构，然后通过快速冷却来保存。这种从无序到有序的转变产生了相稳定的纳米级 MPEI，其成分（例如 PtPdAuFeCoNiCuSn）是以前传统合成方法无法实现的。这种合成策略通过获得纳米级尺寸范围和具有潜在广泛应用的新颖组合物，为开发以前未探索的 MPEI 纳米颗粒提供了新的范例。通过无序到有序的转变合成了多主元金属间纳米颗粒。
Nanoscale multi-principal element intermetallics (MPEIs) may provide a broad and tunable compositional space of active, high–surface area materials with potential applications such as catalysis and magnetics. However, MPEI nanoparticles are challenging to fabricate because of the tendency of the particles to grow/agglomerate or phase-separated during annealing. Here, we demonstrate a disorder-to-order phase transition approach that enables the synthesis of ultrasmall (4 to 5 nm) and stable MPEI nanoparticles (up to eight elements). We apply just 5 min of Joule heating to promote the phase transition of the nanoparticles into L10 intermetallic structure, which is then preserved by rapidly cooling. This disorder-to-order transition results in phase-stable nanoscale MPEIs with compositions (e.g., PtPdAuFeCoNiCuSn), which have not been previously attained by traditional synthetic methods. This synthesis strategy offers a new paradigm for developing previously unexplored MPEI nanoparticles by accessing a nanoscale-size regime and novel compositions with potentially broad applications. Multi-principal element intermetallic nanoparticles are synthesized via disorder-to-order transition.
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DOI：
10.1088/0965-0393/21/5/055020
发表时间：
2013-07-01
影响因子：
1.8
作者：
Coleman, S. P.;Spearot, D. E.;Capolungo, L.
通讯作者：
Capolungo, L.
影响因子：
56.9
作者：
Chen, Peng-Cheng;Liu, Xiaolong;Mirkin, Chad A.
通讯作者：
Mirkin, Chad A.
影响因子：
41.2
作者：
Alloyeau, D.;Ricolleau, C.;Loiseau, A.
通讯作者：
Loiseau, A.
影响因子：
8.6
作者：
DeSario, Douglas Y.;DiSalvo, Francis J.
通讯作者：
DiSalvo, Francis J.
影响因子：
4
作者：
Karanasos, V;Panagiotopoulos, I;Hadjipanayis, GC
通讯作者：
Hadjipanayis, GC