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首页> 外文学位 >Cadmium-based nanocrystals and nanocomposites at the air-water interface.
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Cadmium-based nanocrystals and nanocomposites at the air-water interface.

机译：空气-水界面处的镉基纳米晶体和纳米复合材料。

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Two cadmium-based nanocrystals were studied, cadmium selenide and cadmium telluride, which have potential applications in optoelectronic devices. CdSe quantum dots and nanorods were synthesized with a functional ligand, allowing for the formation of nanocomposites where a vinyl terminated conjugated polymer is attached through a mild Heck coupling. This provided a direct connection between the polymer and quantum, yielding improved charge transport from the polymer to the quantum dot.;The QD-CP nanocomposite was placed on the air-water interface and studied for the first time. The Langmuir isotherm was obtained and showed intriguing packing behavior, which a model system was proposed where the conjugated polymer bends and folds only at the conjugation length. A photovoltaic device was fabricated and showed poor performance, yet high short circuit current.;Cadmium telluride tetrapods were synthesized in a manner that easily controlled the arm width and therefore absorption peak and onset. The tetrapods were placed on the airwater interface and showed unique dewetting behavior, forming ribbon like structures at the onset of pressure. At higher pressures, flower aggregated formed along the ribbon structure and eventual network structure formed.;CdSe nanorods were synthesized in the presence of a functional ligand. Initial NMR results show promise in this one batch synthesis, compared to the previous work done through ligand exchange. This shows promise and future work is continuing through colleagues in the Lin Research Group.
机译：研究了两种基于镉的纳米晶体，硒化镉和碲化镉，它们在光电器件中具有潜在的应用。使用功能性配体合成了CdSe量子点和纳米棒，从而形成了纳米复合材料，其中乙烯基封端的共轭聚合物通过温和的Heck偶联连接。这提供了聚合物与量子之间的直接连接，从而改善了从聚合物到量子点的电荷传输。;将QD-CP纳米复合材料放在空气-水界面上，并进行了首次研究。获得了Langmuir等温线并显示出令人感兴趣的堆积行为，提出了一个模型系统，其中共轭聚合物仅在共轭长度处弯曲和折叠。制造了一种光伏器件，并显示出较差的性能，但短路电流却很高。合成碲化镉四脚架的方式很容易控制臂的宽度，从而控制了吸收峰和起效。将四足动物放在空气-水界面上，表现出独特的去湿性能，在压力开始时形成带状结构。在较高的压力下，沿带状结构形成花聚集体，最终形成网状结构。CdSe纳米棒在功能性配体存在下合成。与以前通过配体交换完成的工作相比，最初的NMR结果显示出这一批合成方法的希望。这表明林研究小组的同事们充满了希望和未来的工作。

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