Carbon dot-loaded Fe3O4 as photonic pigments for multilevel anti-counterfeiting

Amorphous arrays assembled from colloidal microspheres are a way to obtain angle-independent structural colors. In order to obtain additional properties, colloidal microspheres as constituent units can be modified with other materials. Here, we utilized the silane functionalized carbon quantum dots (SiCDs) by incorporating them into the Stöber reaction to fabricate Fe