量子点-聚合物复合材料的合成与表征。

Joe Weaver, Rashid Zakeri, Samir Aouadi, Punit Kohli
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引用次数: 47

摘要

在本研究中,我们展示了一种简便的量子点-聚合物复合材料的合成方法。高荧光半导体CdSe/ZnS量子点嵌入不同的商用聚合物使用一个简单的步骤。采用模板辅助合成方法合成了量子点聚合物复合纳米颗粒。特别地,我们在纳米多孔氧化铝膜内自组装了层状胶束,用于合成介孔二氧化硅空心纳米管和固体纳米棒。我们观察到,在qd -二氧化硅溶液中加入过量的游离十八胺(ODA)会导致凝胶化。胶凝时间与游离ODA浓度有关。同样,qd -聚合物复合材料的发射也被发现依赖于游离ODA浓度。与未纯化的纳米复合材料相比,高度纯化的量子点提供了具有更低发射的聚合物复合材料。这归因于胺对量子点表面的钝化,这减少了激发量子点的表面缺陷和非辐射途径。最后,在玻璃衬底上展示了高荧光量子点聚合物图案,在极性和非极性溶剂中都保持其发光。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis and characterization of quantum dot-polymer composites.

Synthesis and characterization of quantum dot-polymer composites.

Synthesis and characterization of quantum dot-polymer composites.

Synthesis and characterization of quantum dot-polymer composites.

In this study, we demonstrate a facile and simple synthesis of quantum dot (QD)-polymer composites. Highly fluorescent semiconducting CdSe/ZnS quantum dots were embedded in different commercially available polymers using one easy step. QD-polymer composite nanoparticles were also synthesized using template-assisted synthesis. In particular, we self-assembled lamellar micelles inside nanoporous alumina membranes which were used for the synthesis of mesoporous silica hollow nanotubes and solid nanorods. We observed that the addition of excess free octadecylamine (ODA) in the QD-silica solution resulted in gelation. The gelation time was found to be dependent on free ODA concentration. Similarly, the emission of QD-polymer composites was also found to be dependent on free ODA concentration. Highly purified QDs provided polymer composites that have a much lower emission compared to unpurified nanocomposites. This was attributed to passivation of the QD surfaces by amine, which reduced the surface defects and non-radiative pathways for excited QDs. Finally, highly fluorescent QD-polymer patterns were demonstrated on glass substrates which retained their emission in both polar and non-polar solvents.

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来源期刊
Journal of Materials Chemistry
Journal of Materials Chemistry 工程技术-材料科学:综合
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1.5 months
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