Binary blend nanoparticles with defined morphology

Abstract

In this study polymer blends of polystyrene and poly(propylene carbonate) were prepared using the miniemulsion process as model systems for the nanoparticles consisting of semiconducting polymers for optical applications. The blends were prepared by mixing nanoparticles of pure polymers or by fabricating blend nanoparticles including both the two polymers in each particle. The development of controlled hemispherical phase separated morphology (Janus morphology) within the blend nanoparticles was realized here by using the adequate concentration of the surfactant. In addition blend nanoparticles were prepared, for the first time using the Ouzo effect process. PS particles functionalized with carboxylic or pyridyl groups were prepared by miniemulsifying solutions of PS-co-PMAA or PS-co-P(4-VP). Relying on our capabilities to control the phase separated morphology within the blend nanoparticles in combination with using functional polymers two types of functionalized Janus particles were designed and fabricated. In our study the functionality on the latex particles were further used as ligand for silver ions and for the subsequent formation of silver nanoparticles on the latex particle substrates. The Janus particles were proven to be smart enough for the selective formation of the metal nanoparticles on the functionalized face.