We demonstrate that homopolypeptides covalently tethered to anisotropically shaped silica particles induce crystalline ordering of representative semiconducting polymers. Films drop-cast from chloroform dispersions of poly(γ-stearyl-l-glutamate) (PSLG) composite particles and poly(3-hexythiophene) (P3HT) led to highly ordered crystalline structures of P3HT. Hydrophobic–hydrophobic interactions between the alkyl side chains of P3HT and PSLG were the main driving force for P3HT chain ordering into the crystalline assemblies. It was found that the orientation of rigid P3HT fibrils on the substrate adopted the directionality of the evaporating front. Regardless of the PSLG-coated particle dimensions used, the drop-cast films displayed patterns that were shaped by the coffee ring and Marangoni effects. PSLG-coated particles of high axial ratio (4.2) were more efficient in enhancing the electronic performance of P3HT than low axial ratio (2.6) homologues. Devices fabricated from the ordered assemblies displayed improved charge-carrier transport performance when compared to devices fabricated from P3HT alone. These results suggest that PSLG can favorably mediate the organization of semiconducting polymers.

中文翻译：

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π复合聚合物的多肽复合颗粒辅助组织为高度结晶的“咖啡渍”

我们证明共价绑定到各向异性形状的二氧化硅粒子的同多肽诱导代表性的半导体聚合物的结晶顺序。从聚（γ-硬脂基-l）的氯仿分散体滴铸薄膜-谷氨酸）（PSLG）复合粒子和聚（3-heyythiophene）（P3HT）导致P3HT的晶体结构高度有序。P3HT和PSLG的烷基侧链之间的疏水-疏水相互作用是P3HT链有序进入晶体组件的主要驱动力。发现刚性P3HT原纤维在基底上的取向采用了蒸发锋面的方向性。不管使用哪种PSLG涂层颗粒尺寸，滴铸薄膜都显示出由咖啡环和Marangoni效应形成的图案。高轴向比率（4.2）的PSLG涂层颗粒比低轴向比率（2.6）的同系物更有效地增强了P3HT的电子性能。与仅由P3HT制成的器件相比，由有序组件制成的器件显示出更高的电荷载流子传输性能。这些结果表明PSLG可以很好地介导半导体聚合物的组织。