Synthesis and characterization of quantum dot-polymer composites.
Synthesis and characterization of quantum dot-polymer composites.
复制标题
DOI：
10.1039/b820204d
复制
发表时间：
2009-04-01
影响因子：
--
通讯作者：
Kohli P
中科院分区：
文献类型：
--
作者：
Weaver J;Zakeri R;Aouadi S;Kohli P
在这项研究中，我们展示了量子点（QD）-聚合物复合材料的简便合成。通过一个简单的步骤，将高荧光半导体 CdSe/ZnS 量子点嵌入到不同的市售聚合物中。还使用模板辅助合成法合成了量子点-聚合物复合纳米颗粒。特别是，我们在纳米多孔氧化铝膜内自组装层状胶束，用于合成介孔二氧化硅中空纳米管和实心纳米棒。我们观察到，在 QD-二氧化硅溶液中添加过量的游离十八胺 (ODA) 会导致凝胶化。发现胶凝时间取决于游离 ODA 浓度。同样，QD-聚合物复合材料的排放也被发现依赖于游离 ODA 浓度。高度纯化的量子点提供的聚合物复合材料的发射量比未纯化的纳米复合材料低得多。这归因于胺对量子点表面的钝化，从而减少了激发量子点的表面缺陷和非辐射路径。最后，在玻璃基板上展示了高荧光量子点聚合物图案，该图案在极性和非极性溶剂中均保留了发射光。
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.
登录
查看更多内容
影响因子：
3.3
作者：
Cordero, SR;Carson, PJ;Buratto, SK
通讯作者：
Buratto, SK
影响因子：
3.3
作者：
Kalyuzhny, G;Murray, RW
通讯作者：
Murray, RW
影响因子：
56.9
作者：
Bruchez, M;Moronne, M;Alivisatos, AP
通讯作者：
Alivisatos, AP
影响因子：
56.9
作者：
Dubertret, B;Skourides, P;Libchaber, A
通讯作者：
Libchaber, A
影响因子：
56.9
作者：
Gur, I;Fromer, NA;Alivisatos, AP
通讯作者：
Alivisatos, AP