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相关概念视频

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

2.7K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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相关实验视频

Updated: May 10, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

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预处理提供了3D晶体聚3-基) 结构.

Mengting Sun1, Zeyuan Sun1, Yulong Zheng2

  • 1Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States.

Chemistry of materials : a publication of the American Chemical Society
|April 28, 2025
PubMed
概括
此摘要是机器生成的。

振动辅助沉积增强了有机场效应晶体管 (OFET) 的聚3-基二二 (P3HT) 结晶. 这种处理方法改善了分子排序和电荷传输,从而提高了设备的移动性.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 有机电子 有机电子
  • 聚合物化学 聚合物化学

背景情况:

  • 聚3-基thiophene-2,5-diyl) (P3HT) 是有机场效应晶体管 (OFET) 的一个关键材料.
  • 溶液处理和沉积显著影响P3HT聚合和结晶.
  • 控制分子排序对于优化OFET中的电荷传输至关重要.

研究的目的:

  • 研究振动辅助对流沉积对P3HT膜形态和OFET性能的影响.
  • 为了比较振动辅助的对流沉积与其他常见的沉积技术.
  • 了解处理,分子排序和设备特征之间的关系.

主要方法:

  • 使用P3HT活性层制造OFET.
  • 螺旋涂层,叶片涂层,对流沉积和振动辅助对流沉积的比较.
  • 使用紫外可见光谱和放牧发生率广角X射线散射 (GWAXS) 进行了表征.

主要成果:

  • 振动辅助的对流沉积促进了链内相互作用,更长的结合长度和聚合物骨干平面化.
  • 预处理 (超声波和老化) 与振动辅助沉积相结合,导致J型聚合和有序的3D晶体结构.
  • 使用这些优化的薄膜制造的OFET实现了高流动性,可达0.14cm2V-1s-1.1.

结论:

  • P3HT电荷传输对分子内部相互作用和骨干平面性高度敏感.
  • 振动辅助沉积是一种有效的控制P3HT聚合和结晶的技术.
  • 优化处理带来了增强的分子排序和更好的OFET性能.