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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

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Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization
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自调自调的晶体无机纳米线圈.

Peng-peng Wang1, Yong Yang, Jing Zhuang

  • 1Department of Chemistry, Tsinghua University, Beijing, P R China.

Journal of the American Chemical Society
|April 25, 2013
PubMed
概括

研究人员从超薄的纳米丝带开发出柔性硫化物纳米线圈. 这些新的纳米结构自组装成超级格子,为先进材料的构建提供了新的可能性.

科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 晶体学 晶体学是指结晶学.

背景情况:

  • 生物大分子,如蛋白质,形成复杂的晶体结构,是生物学必不可少的.
  • 无机纳米结构往往缺乏生物宏分子的灵活性,用于超级晶格结构,由于刚性.

研究的目的:

  • 为了合成灵活的无机纳米结构,能够自组装.
  • 探索这些纳米结构作为超级格子的构建块的潜力.

主要方法:

  • 合成晶体硫化纳米丝带.
  • 观察自发的自我卷入纳米线圈的过程.
  • 在溶液中分析纳米结构的灵活性和自组装.

主要成果:

  • 成功合成了超薄的硫化纳米丝带 (厚度约0.9nm).
  • 观察到纳米丝带自发卷积成柔性纳米线圈.
  • 证明了纳米线圈的自我调整和组装成2D超级网和3D超级晶体.

结论:

  • 超薄,灵活的纳米线圈为纳米晶体构建块提供了一个新的范式.
  • 硫化纳米线圈可以克服无机纳米结构组装中的刚性限制.

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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  • 这些发现为设计使用柔性纳米晶体的新型超结构开辟了道路.