Wenderoth Sarah, Müssig Stephan, Prieschl Johannes, Genin Emilie, Heuzé Karine, Fidler Florian, Haddad Daniel, Wintzheimer Susanne, Mandel Karl
Chair of Chemical Technology of Materials Synthesis, Julius-Maximilians-University Würzburg, Röntgenring 11, D97070 Würzburg, Germany.
Fraunhofer-Institute for Silicate Research ISC, Neunerplatz 2, D97082 Würzburg, Germany.
Nano Lett. 2022 Apr 13;22(7):2762-2768. doi: 10.1021/acs.nanolett.1c04773. Epub 2022 Mar 21.
Identifying and ensuring the integrity of products plays an important role in today's globalized world. Miniaturized information taggants in the packaging surface are therefore required to monitor the product itself instead of applying external labels. Ideally, multiple types of information are stored in such additives. In this work, micrometer-sized core-shell particles (supraparticles) were developed to provide material surfaces with both an identifier and a surface abrasion indication functionality. The core of the supraparticles contains iron oxide nanoparticles that allow identification of the surface with a spectral magnetic code resolved by magnetic particle spectroscopy. The fluorescent silica nanoparticles in the supraparticle shell can be abraded by mechanical stress and resolved by fluorescence spectroscopy. This provides information about the mechanical integrity of the system. The application as surfaces, that contain several types of information in one supraparticle, was demonstrated here by incorporating such bifunctional supraparticles as additives in a surface coating.
在当今全球化的世界中，识别并确保产品的完整性起着重要作用。因此，需要在包装表面使用微型化信息标记物来监测产品本身，而不是粘贴外部标签。理想情况下，此类添加剂中存储有多种类型的信息。在这项工作中，开发了微米级的核壳颗粒（超颗粒），为材料表面提供标识符和表面磨损指示功能。超颗粒的核心包含氧化铁纳米颗粒，可通过磁颗粒光谱法解析的光谱磁码来识别表面。超颗粒壳中的荧光二氧化硅纳米颗粒会因机械应力而磨损，并通过荧光光谱法解析。这提供了有关系统机械完整性的信息。通过将这种双功能超颗粒作为添加剂掺入表面涂层中，展示了其作为在一个超颗粒中包含多种类型信息的表面的应用。
