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首页> 外文期刊>Crystal growth & design >Disruption of Molecular Ordering over Several Layers near the Au/2,8-Difluoro-5,11-bis(triethylsilylethynyl) Anthradithiophene Interface
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Disruption of Molecular Ordering over Several Layers near the Au/2,8-Difluoro-5,11-bis(triethylsilylethynyl) Anthradithiophene Interface

机译：Au / 2,8-二氟-5,11-双（三乙基甲硅烷基乙炔基）蒽噻吩界面附近几层分子的有序破坏

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摘要

The transition from an electrode-dominated ordered monolayer structure to a bulk-like thin film crystal structure of 2,8-difluoro-5,11-bis(triethylsilylethynyl) anthradithiophene (diF-TES-ADT) is observed to occur over at least the first four molecular layers near the electrode surface. Scanning tunneling microscopy studies of the growth of diF-TES-ADT on Au(111) show that the first two molecular layers assemble with aromatic planes parallel to the substrate surface. The monolayer structures are highly stable and well-ordered, while the bilayer structures are more loosely packed and poorly ordered. Subsequent diF-TES-ADT growth results in a more bulk-like layer containing standing up molecular configurations approaching the (001) crystal face as observed by grazing incidence wide angle X-ray scattering measurements. However, the third and fourth monolayers also show poor long-range ordering and an apparent height modulation that indicate significant strain effects from the substrate still persist.
机译：从电极主导的有序单层结构到2,8-二氟-5,11-双（三乙基甲硅烷基乙炔基）蒽噻吩（diF-TES-ADT）的块状薄膜晶体结构的转变至少发生在电极表面附近的前四个分子层。 diF-TES-ADT在Au（111）上生长的扫描隧道显微镜研究表明，前两个分子层以平行于基材表面的芳族平面组装。单层结构是高度稳定和有序的，而双层结构则是较松散的包装和有序的。随后的diF-TES-ADT增长导致了一个更大的块状层，其中包含直立的分子构型，接近（001）晶面，这是通过掠射入射广角X射线散射测量观察到的。但是，第三和第四单分子层还显示出较差的长程有序性和明显的高度调制，表明来自基材的明显应变效应仍然持续存在。

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