Characterization of conjugated molecule monolayer chemically bonded on semiconductor surface and its application to single molecular light emitting devices

在这项研究中，我们证明了缩化反应作为一种通用的方法来固定芳香醛分子在金属氧化物半导体表面，如氧化铟锡。在ITO表面固定化的对苯二醛（TPA）极易与芳香二胺反应生成分子长度可控的亚甲亚胺低聚物。我们成功地开发了一种简单的方法来生产共轭聚合物的电纺丝纤维，并控制了它们的数量和直径。我们观察到纳米纤维的大的光学各向异性和电导率随着分子取向的增加而增强。

In this study, we demonstrated an acetalization reaction as a versatile method to immobilize aromatic aldehyde molecules on surfaces of metal oxide semiconductor such as indium tin oxide. A terephthalaldehyde(TPA) immobilized on the ITO surface readily react with aromatic diamines to form azomethine oligomers with controlled molecular length. We have successfully developed a simple method to produce electrospun fibers of conjugated polymers with controlling their number and diameter. We observed large optical anisotropy and enhancement of electrical conductivity as increasing molecular orientation by mechanical stretching of nanofiber.