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首页> 外文期刊>Journal of Materials Research >Self-organization of phthalocyanines on Al_2O_3 (11(2-bar)0) in aligned and ordered films
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Self-organization of phthalocyanines on Al_2O_3 (11(2-bar)0) in aligned and ordered films

机译：对齐和有序薄膜中Al_2O_3（11（2-bar）0）上酞菁的自组织

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摘要

We studied the self-organization process of F_(16)CuPc films (20-30 ML) on stepped Al_2O_3 (11(2-bar)0) substrates. X-ray diffraction measurements revealed a highly ordered layered structure with the molecules in a nearly upright configuration. The morphology, investigated by atomic force microscopy, consisted of long (several microns) and narrow (20-100 nm) needlelike terraces unidirectionally aligned along one of the main crystallographic directions of the Al_2O_3 (11(2-bar)0) surface. High resolution atomic force microscopy images revealed in-plane molecular order with the molecular stacking direction parallel to the needlelike terraces. Such anisotropic morphology is the result of a self-organization process of F_(16)CuPc in elongated crystallites driven to a preferential orientation by the interaction with the substrate. Spectroscopic ellipsometry showed that these films exhibit anisotropic optical properties correlated with the molecular arrangement.
机译：我们研究了在阶梯式Al_2O_3（11（2-bar）0）衬底上F_（16）CuPc膜（20-30 ML）的自组织过程。 X射线衍射测量揭示了一个高度有序的分层结构，分子几乎处于直立状态。通过原子力显微镜研究的形态包括长（几微米）和窄（20-100 nm）的针状台阶，它们沿着Al_2O_3（11（2-bar）0）表面的主要晶体学方向之一单向排列。高分辨率原子力显微镜图像揭示了平面内分子顺序，分子堆叠方向平行于针状平台。这种各向异性的形态是F_（16）CuPc在细长微晶中的自组织过程的结果，该微晶通过与基板的相互作用而驱动到优先取向。椭圆偏振光谱分析表明，这些膜表现出与分子排列相关的各向异性光学性质。

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