Epitaxial orientations of para-sexiphenyl platelets grown on alkali halide (001) surfaces
Epitaxial orientations of para-sexiphenyl platelets grown on alkali halide (001) surfaces
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DOI：
10.1103/physrevb.79.235413
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发表时间：
2009-06-01
影响因子：
3.7
通讯作者：
Kintzel, Edward J., Jr.
中科院分区：
文献类型：
--
作者：
Smilgies, Detlef-M.;Kintzel, Edward J., Jr.
近年来，在新兴的有机电子领域，简单芳香分子的薄膜生长得到了深入研究。在原子定义明确且非反应性碱金属卤化物 (001) 表面上简单棒状分子的薄膜生长也构成了分子外延研究的典型模型系统。我们观察到对六苯基片晶在一系列晶格常数范围为 4.6 至 6.6 埃的碱金属卤化物表面上具有令人惊讶的多种择优取向。我们提出了一种度量标准，有助于对主要外延方向进行分类，并使我们能够预测其他岩盐型基板上的外延方向，并且我们将表面波纹确定为这些首选相对方向的驱动力。
Thin film growth of simple aromatic molecules has been researched intensely in recent years in the burgeoning field of organic electronics. Film growth for simple rodlike molecules on the atomically well-defined and nonreactive alkali halide (001) surfaces also constitutes an archetypical model system for the study of molecular epitaxy. We have observed a surprising variety of preferential orientations of para-sexiphenyl platelets on a series of alkali halide surfaces with lattice constants ranging from 4.6 to 6.6 angstrom. We present a metric that helps to classify the dominant epitaxial orientations and allows us to predict epitaxial orientations on other rocksalt-type substrates, and we identified surface corrugation as the driving force for these preferred relative orientations.