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相关概念视频

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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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...
2.9K

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相关实验视频

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Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
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无形纳米材料的近期进展

Jianxin Kang1, Xiuyi Yang1, Qi Hu1

  • 1School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, Beihang University, Beijing 100191, China.

Chemical reviews
|June 26, 2023
PubMed
概括

无形纳米材料缺乏远程原子秩序,表现出独特的结构特征和特性. 本综述探讨了它们的合成,应用,以及用于先进材料设计的结构功能关系.

科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 固态化学 固态化学

背景情况:

  • 无形材料是转移稳定的固体,其特点是近距离的原子序列.
  • 不同于晶体材料,无形纳米材料具有独特的结构特征,如同otropic环境和丰富的表面悬浮键.
  • 这些特征影响电子属性,使各种应用成为可能.

研究的目的:

  • 为提供无形纳米材料的概述.
  • 讨论它们独特的结构特征,合成方法和应用.
  • 检查连接结构,属性和性能的理论机制.

主要方法:

  • 对无形纳米材料当代研究的文献综述.
  • 结构特征分析和合成方法.
  • 检查结构与财产关系的理论模型.

主要成果:

  • 无形纳米材料具有明显的结构优势,包括增强的电催化,光学和机械性能.
  • 阐明了无形纳米材料中的结构功能关系.
  • 在各种领域确定了潜在的应用.

结论:

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  • 无形纳米材料由于其独特的结构和电子特性,具有显著的潜力.
  • 需要进一步的研究来建立成熟的系统,为先进的应用程序建立高级层次结构.
  • 未来的机遇在于克服准备和利用方面的挑战.