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Directed self-assembled crystalline oligomer domains on graphene and graphite

机译：在石墨烯和石墨上定向自组装的结晶低聚物域

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摘要

We observe the formation of thin films of fibre-like aggregates from the prototypical organic semiconductor molecule para-hexaphenylene (p-6P) on graphite thin flakes and on monolayer graphene. Using atomic force microscopy, scanning electron microscopy, x-ray diffraction, polarized fluorescence microscopy, and bireflectance microscopy, the molecular orientations on the surface are deduced and correlated to both the morphology as well as to the high-symmetry directions of the graphitic surface: the molecules align with their long axis at ±11° with respect to a high-symmetry direction. The results show that the graphene surface can be used as a growth substrate to direct the self-assembly of organic molecular thin films and nanofibres, both with and without lithographical processing.
机译：我们观察到由石墨薄片和单层石墨烯上的典型有机半导体分子对六亚苯基（p-6P）形成的纤维状聚集体薄膜。使用原子力显微镜，扫描电子显微镜，x射线衍射，偏振荧光显微镜和双反射显微镜，可以推断出表面上的分子方向，并将其与石墨表面的形态以及高对称方向相关联：这些分子的长轴相对于高对称方向对齐在±11°处。结果表明，无论是否进行光刻处理，石墨烯表面均可用作生长基质，指导有机分子薄膜和纳米纤维的自组装。

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