一个刚性棒结合聚合物的纳米线晶体
Huanli Dong1, Shidong Jiang, Lang Jiang
1Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Journal of the American Chemical Society
|November 7, 2009
概括
高结晶的聚合物纳米线是通过自组装合成的. 这些聚甲乙烯 (PPEs) 在有机场效应晶体管 (OFET) 中表现出增强的电荷载体流动性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术 纳米技术
背景情况:
- 像聚甲乙烯 (PPEs) 这样的合聚合物是有希望的有机半导体.
- 控制聚合物形态对于优化电子性能至关重要.
- 自组装为有序纳米结构提供了一条路径.
研究的目的:
- 为了合成一个乙酸终结的PPE衍生物 (TA-PPE) 的明确的,晶体纳米线.
- 为了研究这些TA-PPE纳米线的结构特性.
- 评估TA-PPE纳米线在有机场效应晶体管 (OFET) 中的电荷传输特性.
主要方法:
- 稀释溶液自组装TA-PPE. 的自组装.
- 使用X射线衍射进行结构分析,以确定晶体单元细胞和晶格参数.
- 使用单个纳米线的有机场效应晶体管 (OFET) 的制造和表征.
主要成果:
- 实现了高度结晶的,正角形的TA-PPE纳米线 (a ≈ 13.63 Å,b ≈ 7.62 Å,c ≈ 5.12 Å).
- 聚合物骨干与纳米线轴平行对齐,侧链面向基板.
- 与薄膜相比,在纳米线OFET中观察到显著增强的电荷载体移动性 (高达0.1cm2/Vs,平均~10−2cm2/Vs).
结论:
- 自组装的TA-PPE纳米线形成高度有序的晶体结构.
- 一维的晶体形态显著提高了PPE半导体中电荷载体的移动性.
- 这些发现对理解个人防护设备的内在特性和推进有机电子设备有价值.
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