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首页> 外文期刊>Advanced Functional Materials >Self-Assembly of Nanostructured, Complex, Multication Films via Spontaneous Phase Separation and Strain-Driven Ordering
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Self-Assembly of Nanostructured, Complex, Multication Films via Spontaneous Phase Separation and Strain-Driven Ordering

机译：通过自发相分离和应变驱动有序自组装纳米结构的复杂多阳离子薄膜

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摘要

Spontaneous self-assembly of a multication nanophase in another multi-cation matrix phase is a promising bottom-up approach to fabricate novel, nanocomposite structures for a range of applications. In an effort to understand the mechanisms for such self-assembly, complimentary experimental and theoretical studies are reported to first understand and then control or guide the self-assembly of insulating BaZrO_3 (BZO) nanodots within REBa_2Cu_3O__(7-δ) (RE = rare earth elements including Y, REBCO) superconducting films. The strain field developed around BZO nanodots embedded in the REBCO matrix is a key driving force dictating the self-assembly of BZO nanodots along REBCO c-axis. The size selection and spatial ordering of BZO self-assembly are simulated using thermodynamic and kinetic models. The BZO self-assembly is controllable by tuning the interphase strain field. REBCO superconducting films with BZO defect arrays self-assembled to align in both vertical (REBCO c-axis) and horizontal (REBCO ab-planes) directions result in the maximized pinning and J_c performance for all field angles with smaller angular J_c anisotropy. The work has broad implications for the fabrication of controlled self-assembled nanostructures for a range of applications via strain-tuning.
机译：在另一种多阳离子基质相中，多阳离子纳米相的自发自组装是一种有希望的自下而上的方法，可用于制造一系列应用的新型纳米复合结构。为了了解这种自组装的机理，据报道，进行了互补的实验和理论研究，以首先了解然后控制或指导REBa_2Cu_3O __（7-δ）内绝缘BaZrO_3（BZO）纳米点的自组装（RE =稀有稀土元素，包括Y，REBCO）超导薄膜。围绕嵌入REBCO基质中的BZO纳米点周围产生的应变场是决定BZO纳米点沿REBCO c轴自组装的关键驱动力。利用热力学和动力学模型模拟了BZO自组装的尺寸选择和空间排序。 BZO自组装可通过调整相间应变场来控制。具有BZO缺陷阵列的REBCO超导膜可自组装以在垂直（REBCO c轴）和水平（REBCO ab平面）方向上对齐，从而在具有较小角度J_c各向异性的所有场角下实现了最大的钉扎和J_c性能。这项工作对于通过应变调谐为一系列应用制造受控的自组装纳米结构具有广泛的意义。

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  • 来源
    《Advanced Functional Materials》 |2013年第15期|1912-1918|共7页
  • 作者

    Sung Hun Wee; Yanfei Gao; Yuri L Zuev; Karren L More; Jianyong Meng; Jianxin Zhong; George M. Stocks; Amit Goyal;

  • 作者单位

    Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, USA;

    Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, USA,Department of Materials Science and Engineering University of Tennessee Knoxville, TN 37996, USA;

    Department of Physics University of Tennessee Knoxville, TN 37996, USA;

    Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, USA;

    Department of Materials Science and Engineering University of Tennessee Knoxville, TN 37996, USA;

    Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, USA;

    Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, USA;

    Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831, USA;

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