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相关概念视频

Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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覆盖层通过冷绘使二维材料的可控碎片化成为可能.

Ming Chen1,2, Dong Li3, Yuxin Hou1,2

  • 1Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China. ming.chen2@siat.ac.cn.

Materials horizons
|October 20, 2023
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概括

一个封闭层可以防止在聚合物冷绘过程中二维材料过早破裂. 这使得可控的碎片化能够产生微条带,这对于灵活的电子应用至关重要.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物工程 聚合物工程
  • 纳米技术纳米技术

背景情况:

  • 冷绘是一种聚合物加工技术.
  • 它可以结构聚合物复合物和脆性材料.
  • 可以制造订购的图案,包括2D材料的微丝带.
  • 控制碎片化的潜在机制尚未完全理解.

研究的目的:

  • 为了研究封装层在冷绘制过程中对二维材料碎片化的影响.
  • 了解控制碎片大小和模式形成的机制.
  • 为了证明使用这种方法制造柔性电极.

主要方法:

  • 试验研究冷拉工艺的实验研究.
  • 用有限元计算来建模应力和张力.
  • 理论建模以确定碎片化标准.
  • 柔性和可拉伸电极的制造.

主要成果:

  • 封装层可以防止聚合物基板上的二维材料过早断裂.
  • 控制的碎片化发生在结阶段.
  • 封装层会影响得到的二维材料碎片的大小.
  • 基于二维材料带的柔性电极成功制造.

结论:

  • 该研究提供了对2D材料冷绘的机械学理解.
  • 覆盖层对于受控的碎片化和模式形成至关重要.
  • 该技术为灵活电子产品的功能2D材料的可扩展制造提供了路线图.