Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition
Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition
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DOI：
10.1038/am.2017.197
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发表时间：
2017-11
影响因子：
9.7
通讯作者：
M. Miura;B. Maiorov;Michio Sato;M. Kanai;T. Kato;T. Kato;T. Izumi;S. Awaji;P. Mele;M. Kiuchi;T. Matsushita
中科院分区：
文献类型：
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作者：
M. Miura;B. Maiorov;Michio Sato;M. Kanai;T. Kato;T. Kato;T. Izumi;S. Awaji;P. Mele;M. Kiuchi;T. Matsushita
由于紧迫的全球环境挑战，重点已经放在有效利用能源的材料上，这引发了对纳米结构改性方法的研究，以提高性能。实现高密度的可调尺寸的第二相纳米颗粒，同时确保基质保持完整是一个长期追求的目标。在本文中，我们提出了一种有效的，可扩展的方法来实现这一目标，使用金属有机物沉积在钙钛矿系统REBa 2 Cu 3 O 7（稀土（RE）），提高超导性能，超过以前的成就。我们提出了两种工业上兼容的路线，通过选择第二相材料和空间调制的前体组合物在纳米粒子形成阶段通过控制扩散来调整纳米粒子的尺寸。结合这些路线导致极高密度（8× 10 22 m− 3）的小纳米颗粒（7 nm），增加临界电流，并在所有磁场强度和温度下减少热波动的有害影响。这种方法可以直接应用于其他钙钛矿材料，其中纳米颗粒添加是有益的。
Because of pressing global environmental challenges, focus has been placed on materials for efficient energy use, and this has triggered the search for nanostructural modification methods to improve performance. Achieving a high density of tunable-sized second-phase nanoparticles while ensuring the matrix remains intact is a long-sought goal. In this paper, we present an effective, scalable method to achieve this goal using metal organic deposition in a perovskite system REBa 2 Cu 3 O 7 (rare earth (RE)) that enhances the superconducting properties to surpass that of previous achievements. We present two industrially compatible routes to tune the nanoparticle size by controlling diffusion during the nanoparticle formation stage by selecting the second-phase material and modulating the precursor composition spatially. Combining these routes leads to an extremely high density (8× 10 22 m− 3) of small nanoparticles (7 nm) that increase critical currents and reduce detrimental effects of thermal fluctuations at all magnetic field strengths and temperatures. This method can be directly applied to other perovskite materials where nanoparticle addition is beneficial.