分子异质性驱动可重构的阴性液晶滴
Wei-Shao Wei1,2, Yu Xia3,4, Sophie Ettinger5,3
1Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA. weiwe@sas.upenn.edu.
Nature
|December 20, 2019
概括
多分散的阴性液晶寡合体中的分子异质性令人惊地促进了可逆的形状转换. 这一发现使得各种可控制的软材料结构能够在先进材料中得到潜在应用.
科学领域:
- 软物质物理学
- 材料科学
- 超分子化学
背景情况:
- 多分散性通常会阻碍材料的自我组装和状态转换.
- 之前关于液滴形状转换的研究假设材料反应均.
研究的目的:
- 研究多分散性阴性液晶寡合体 (NLCO) 对自我组装和形状转换的分子异质性的影响.
- 探索NLCO在创造新型软材料形态方面的潜力.
主要方法:
- 研究了多分散性阴性液晶寡合体的平衡悬浮物.
- 不同的寡合物链长度分布,温度和表面活性剂度.
- 利用观察和计算建模来理解形态现象.
主要成果:
- 聚散NLCO中的分子异质性令人惊地促进了可逆形状转换到各种非球形态.
- 确定可控制的阴影结构,包括粗的球体,"花"形状和分支的丝状网络.
- 在大面积的液晶导体场上证明可逆的分支结构的生产,可转换为液晶弹性体.
结论:
- 链长度的多分散性对于通过空间分离来推动NLCO中的形态现象至关重要.
- 这项研究为设计具有编码网络结构和功能的软材料开辟了新的途径.
- 这些发现挑战了传统的理解,即多分散性阻碍了自我组装.
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