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首页> 外文期刊>Advanced Materials >Direct Observation of the Ordering and Molecular Folding of Poly[(m-phenylenevinylene)-co- (2,5-dioctoxy-p-phenylenevinylene)]
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Direct Observation of the Ordering and Molecular Folding of Poly[(m-phenylenevinylene)-co- (2,5-dioctoxy-p-phenylenevinylene)]

机译：聚[（间亚苯基亚乙烯基）-co-（2,5-二辛氧基-对亚苯基亚乙烯基）]的有序和分子折叠的直接观察

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摘要

π-Conjugated polymers constitute the most important groups of materials used in so-called "plastic electronics", and have been used in the fabrication of field-effect transistors (FETs), light-emitting diodes (LEDs), photovoltaic cells, etc. The control of structural order on the molecular level in semiconducting materials such as conjugated polymers has important consequences for their electronic properties. Conjugated polymers, in particular poly- and oligothiophenes, have been intensively studied in order to understand how structural parameters affect the physical properties and, consequently, the performance of the devices. To this end, model oligothiophenes were designed and synthesized and their two-dimensional (2D) structures, physisorbed from solution onto the basal plane of graphite and MoS_2, were studied by scanning tunneling microscopy (STM). In comparison with atomic force microscopy (AFM), which is widely used for the investigation of mono- and multilayers of macromolec-ular systems, STM provides more details on chain folding as it enables researchers to image polymer chain conformations with submolecular resolution.
机译：π共轭聚合物构成了所谓“塑料电子产品”中使用的最重要的材料，并已用于制造场效应晶体管（FET），发光二极管（LED），光伏电池等。在诸如共轭聚合物之类的半导体材料中，在分子水平上控制结构顺序对其电子性能具有重要的影响。共轭聚合物，特别是聚和低聚噻吩，已经被深入研究，以了解结构参数如何影响物理性能，进而影响器件的性能。为此，设计并合成了模型低聚噻吩，并通过扫描隧道显微镜（STM）研究了它们从溶液中物理吸附到石墨和MoS_2基面上的二维（2D）结构。与广泛用于研究单分子和多层大分子系统的原子力显微镜（AFM）相比，STM提供了更多的链折叠细节，因为它使研究人员能够以亚分子分辨率成像聚合物链构象。

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