InP/ZnS 量子点聚集对偶氮聚合物复合薄膜中记录的双折射动力学的影响

A. Stoilova, D. Dimov, Y. Trifonova, G. Mateev, V. V. Lilova, D. Nazarova, L. Nedelchev
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摘要

文章介绍了以偶氮聚合物(聚[1-[4-(3-羧基-4-羟基苯基偶氮)苯磺酰胺基]-1,2-乙二基,钠盐])为基础,掺杂三种不同浓度的 InP/ZnS 量子点(尺寸为 7.5 纳米)的新型薄膜复合材料的制备过程。从显微镜下可以观察到在制备的复合样品中存在聚集的 InP/ZnS 簇。在两种不同波长的泵浦激光(355 nm 和 444 nm)下,薄膜中产生了双折射(Δn)。根据测量到的荧光光谱,讨论了与未掺杂薄膜和纳米晶体浓度最高的样品相比,掺杂量子点达 2 wt.%的样品获得了更高的Δnmax 值,这可能与偶氮苯发色团和 InP/ZnS 量子点之间的局部能量转移有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of InP/ZnS quantum dots aggregation on the kinetics of birefringence recorded in thin azopolymer composite films
The article describes the preparation of new thin film composite materials based on the azopolymer (poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt]) doped with three different concentration of InP/ZnS quantum dots with size of 7.5 nm. Clusters of aggregated InP/ZnS were microscopically observed in the fabricated composite samples. Birefringence (Δn) was induced in the films at two different wavelengths of the pump laser (355 nm and 444 nm) and the obtained higher values of Δnmax for the samples doped with quantum dots up to 2 wt.% in comparison to the non-doped film and the sample with the highest nanocrystals concentration are discussed, based on the measured fluorescence spectra, in terms of possible local energy transfer between the azobenzene chromophores and the InP/ZnS quantum dots.
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