Uniform electroactive fibre-like micelle nanowires for organic electronics.
Uniform electroactive fibre-like micelle nanowires for organic electronics.
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DOI：
10.1038/ncomms15909
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发表时间：
2017-06-26
影响因子：
16.6
通讯作者：
Manners I
中科院分区：
文献类型：
--
作者：
Li X;Wolanin PJ;MacFarlane LR;Harniman RL;Qian J;Gould OEC;Dane TG;Rudin J;Cryan MJ;Schmaltz T;Frauenrath H;Winnik MA;Faul CFJ;Manners I
通过嵌段共聚物在选择性溶剂中的自组装形成的胶束已经引起了广泛的关注，并且在各种领域中具有用途，而基于其电子性质的应用几乎未被探索。本文中，我们描述了溶液可加工的，低分散性，电活性纤维状胶束的控制长度从π共轭二嵌段共聚物含有结晶区域规则的聚（3-己基噻吩）核心和增溶，无定形区域对称的聚（3-己基噻吩）或聚苯乙烯冠的研究。隧道原子力显微镜测量表明，个别纤维表现出可观的导电性。纤维随后被纳入作为场效应晶体管的有源层。由此产生的电荷载流子迁移率强烈地依赖于核形成块的聚合度和纤维长度，并且独立于电晕组合物。基于常见π-共轭嵌段共聚物的均匀、胶体稳定的电活性纤维状胶束的使用突出了它们在提供对器件中的电荷载体过程的基本了解以及使未来的电子应用成为可能方面的显著潜力。嵌段共聚物的自组装形成胶束已被用于诸如药物递送和复合材料增强的应用中。在这里，作者探讨了在场效应晶体管器件的有源层中使用控制长度的纤维状胶束。
Micelles formed by the self-assembly of block copolymers in selective solvents have attracted widespread attention and have uses in a wide variety of fields, whereas applications based on their electronic properties are virtually unexplored. Herein we describe studies of solution-processable, low-dispersity, electroactive fibre-like micelles of controlled length from π-conjugated diblock copolymers containing a crystalline regioregular poly(3-hexylthiophene) core and a solubilizing, amorphous regiosymmetric poly(3-hexylthiophene) or polystyrene corona. Tunnelling atomic force microscopy measurements demonstrate that the individual fibres exhibit appreciable conductivity. The fibres were subsequently incorporated as the active layer in field-effect transistors. The resulting charge carrier mobility strongly depends on both the degree of polymerization of the core-forming block and the fibre length, and is independent of corona composition. The use of uniform, colloidally stable electroactive fibre-like micelles based on common π-conjugated block copolymers highlights their significant potential to provide fundamental insight into charge carrier processes in devices, and to enable future electronic applications. The self-assembly of block copolymers to form micelles has been used in applications such as drug delivery and composite reinforcement. Here the authors explore the use of fibre-like micelles of controlled length in the active layer of field-effect transistor devices.