Emulsion-directed liquid/liquid interfacial fabrication of lanthanide ion-doped block copolymer composite thin films

Abstract

An emulsion-directed assembly and adsorption approach has been used to fabricate composite films of polystyrene-b-poly(acryl acid)-b-polystyrene (PS-b-PAA-b-PS) /2,2'-bipyridine (bpy) were fabricated using this approach, and their photoluminescence properties were investigated.

Influence of gold species (AuCl4−and AuCl2−) on self-assembly of PS-b-P2VP in solutions and morphology of composite thin films fabricated at the air/liquid interfaces

“…Shortly afterwards, to fabricate microstructures of block copolymers with strongly polar blocks, such as polystyrene-b-poly(acrylic acid)-polystyrene, a new method of emulsion-templated assembly and liquid/liquid interfacial adsorption was developed using a mixed solution of a polymer in DMF/chloroform as the oil phase to fabricate composite films. [39][40][41] The DMF migrated to the aqueous phase, while the water migrated across the interface to the organic phase as soon as the interface was formed, which resulted in the formation of W/O emulsions in the original organic solution due to the ''ouzo effect''. 42 The polymer molecules assembled around the droplets of the emulsion and coordinated with metal ions to form microcapsules, which further assembled into composite thin films that consisted of a foam structure doped with metal ions at the planar liquid/liquid interface.…”