Core-shell colloids and hollow polyelectrolyte capsules based on diazoresins

Abstract

Hollow polyelectrolyte microcapsules containing diazoresins (DZR) were fabricated by the layer-by-layer self-assembly of a polycation, DZR, in alternation with poly(styrenesulfonate) (PSS) onto polystyrene (PS) particles, followed by dissolution of the PS core by tetrahydrofuran (THF). The multilayer film buildup on the colloids was observed by UV-visible spectroscopy, single particle light scattering (SPLS), and transmission electron microscopy (TEM). The data confirmed regular and stepwise layer formation of DZR and PSS on the colloid particles, with a thickness of about 10 nm for each DZR/PSS bilayer when exposed to aqueous solution, and approximately 5 nm in the "dry state". The photosen..