Photoinduced polymer coating of semiconductor nanoparticles in an aerosol process

气溶胶聚合在不需要溶剂和表面活性剂的情况下，用聚合物壳封装半导体纳米颗粒（SNPs）方面表现出巨大的潜力。在此，SNP同时用作单体缩合的核和在UV照射下聚合的引发剂。在该项目的第一阶段，它表明，对于聚丙烯酸丁酯的单体蒸汽压的控制允许调整聚合物壳在不同的SNP（TiO 2，ZnO，Fe 3 O 4）与旋进在纳米范围内使用20至30秒的停留时间在光反应器。此外，它表明，聚合也在空气中和火焰合成的SNP。在第二阶段，应研究气溶胶聚合的三个方面，即颗粒特性（晶格面，颗粒电荷）和单体（吸附行为）之间的相互作用，该方法在两个实例中的应用（光致发光ZnO SNP的稳定性和TiO2 SNP的光活性的增强）以及该技术向其他材料类别（例如等离子体NP）的扩展。

The aerosol polymerization exhibits a great potential for the encapsulation of semiconductor nanoparticles (SNPs) with a polymer shell without the need for solvents and surfactants. Here the SNPs serve at the same time as nuclei for the condensation of the monomer and as an initiator for the polymerization under UV irradiation. In the first period of the project, it was shown that for polybutylacrylate the control of the monomer vapor pressure allows adjustingthe polymer shell on different SNPs (TiO2, ZnO, Fe3O4) with a precession in the nanometer range using residence times of 20 to 30 s in the photoreactor. In addition, it was shown that the polymerization works also in air and for flame synthesized SNPs. In the second period three aspects of aerosol polymerization should be investigated, namely the interplay between particle properties (lattice facets, particle charge) and monomer (adsorption behavior), the application of the method for two examples (stability of photoluminescent ZnO SNP and enhancement of photoactivity of TiO2 SNPs) and the extension of the technology to other material classes (e.g. plasmonic NP).