侧链液晶聚合物与刚性聚乙烯骨干的高度有序的形相中的挫折分子包装
Chun Ye1, Guoqiang Xu, Zhen-Qiang Yu
1Key Laboratory of Polymer Chemistry and Physics of Ministry of Education and Department of Polymer Science and Engineering, College of Chemistry, Peking University, Beijing 100871, China.
Journal of the American Chemical Society
|May 26, 2005
概括
这项研究揭示了硬的聚乙烯骨干和中产物侧链如何创建一个独特的,有序的状液晶相. 扫描道显微镜显示,这种结构产生了与侧链长度相关的导电性纳米模式.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 液晶是一种液晶.
背景情况:
- 刚性聚乙烯骨架和中体质侧链是设计先进材料的关键组成部分.
- 了解聚合物的自我组装成有序的液晶相对于开发新的功能性材料至关重要.
研究的目的:
- 为了研究聚-5--1-的自我组装行为.
- 描述由此产生的液晶相结构及其与分子结构的关系.
- 通过扫描道显微镜探索聚合物的纳米尺度特性和图案设计能力.
主要方法:
- 合成和特征的多5-{[4'-氧-4-双) 碳酸]氧}-1-丁).
- 使用测定分子排序和结构的技术,分析液晶相.
- 扫描道显微镜 (STM) 实验探测表面形态和电子特性.
主要成果:
- 这种聚合物形成了一个高度有序的smectic (Sm) 阶段,具有挫折的结构,由刚性脊椎和中等质悬挂的相互作用驱动.
- 观察到类似叶片的分子形状,整个分子作为液晶相的构建块.
- STM实验显示,尖端削产生有规律的纳米模式,具有周期性的电子导电性,取决于侧链长度.
结论:
- 特殊的分子设计,包括刚性脊柱和带有短间距的中体悬挂,导致独特的挫折的液态晶体相.
- 通过STM观察到的纳米模式展示了一种基于聚合物结构的纳米电子特性控制方法.
- 这项研究为纳米技术的潜在应用提供了关于液晶聚合物的结构-性质关系的见解.
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