Cross-linked, luminescent spherical colloidal and hollow-shell particles

Abstract

Luminescent core-shell particles were prepared by the layer-by-layer deposition of polystyrenesulfonate (PSS) and water-soluble ionene precursor polymers containing fluorene units (PI) onto spherical colloidal particles. Subsequent cross-linking of the PI in the multilayer shell formed the luminescent conjugated oligo-fluorenes. In a further step, removal of the PI/PSS multilayer coated core yielded luminescent hollow capsules. The formation, characterization, and properties of the PI/PSS-coated colloids and PI/PSS hollow capsules have been investigated by electrophoresis (EPM), single particle light scattering (SPLS), transmission electron microscopy (TEM), atomic force microscopy (AFM), an..