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相关概念视频

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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...
Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...

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相关实验视频

Updated: Jun 1, 2026

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
12:04

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

液晶晶滴中的内毒素诱导的结构变化.

I-Hsin Lin1, Daniel S Miller, Paul J Bertics

  • 1Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706-1607, USA.

Science (New York, N.Y.)
|May 21, 2011
PubMed
概括

超敏感的液晶 (LCs) 检测到水中的皮克图内毒素水平,触发了顺序过渡. 这一发现为基于内毒素 - 甘氨酸脂相互作用的响应性软物质提供了新的设计.

科学领域:

  • 软物质物理学 软物质物理学
  • 材料科学是一种材料科学.
  • 生物物理学的生物物理.

背景情况:

  • 表面和污染物的相互作用影响液晶 (LC) 排序.
  • 内毒素是已知的表面活性强大的生物污染物.

研究的目的:

  • 为了研究内毒素对微米大小的液晶水晶滴的顺序过渡的影响.
  • 探索LC对内毒素敏感性背后的机制及其对LC几何和内毒素结构的依赖.

主要方法:

  • 使用微米大小的液晶滴和板块几何形状.
  • 测量顺序过渡由每毫升皮克克拉姆的水中的内毒素度触发.
  • 分析表面度和界面能量变化.
  • 调查拓缺陷和糖脂结构的作用.

主要成果:

  • 每毫升皮克克拉姆的内毒素度会在表面度低于10的LC滴中诱导有序过渡.
  • 观察到的转变不归因于吸附剂诱导的界面能量变化.
  • 对内毒素的LC敏感性随着几何形状 (滴滴与板块) 变化六个数量级.
  • 与拓缺陷的内毒素-LC相互作用调解了滴滴反应.

结论:

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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

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Last Updated: Jun 1, 2026

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
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Published on: May 20, 2018

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

  • 液晶排序转换对内毒素高度敏感,通过与拓缺陷的相互作用进行介导.
  • 液晶的几何形状显著影响其对内毒素的敏感性.
  • 液晶体对葡萄糖脂结构具有强烈的依赖性,为新的响应性软物质设计提供了潜力.