Capsules

We are interested in the development of conjugated polyelectrolyte capsules from inorganic colloids towards use in sensing applications from these new materials. Synthesis of highly monodisperse manganese carbonate particles has been used to serve as template particles for layer-by-layer (LBL) fabrication of polyelectrolyte capsules. Using the LBL technique conjugated polyelectrolytes are deposited on the inorganic colloid to form bilayers of oppositely charged polyelectrolytes, followed by dissolution of the inorganic core leaving behind the PE capsule. This has been demonstrated using poly(diallyldimethylammonium chloride) (PDDA) and poly(phenylene ethynylene) (PPE) with a carboxlate side group (PPE-CO2) to form PE capsules. Capsules have been synthesized in a well dispersed fashion ranging in size from 4-6 μm. Characterization under fluorescent and confocal microscopes displays the stability of the capsules structure, along with the fluorescent emission from the conjugated polyelectrolyte capsule. Future work with these materials will be in the development of sensing applications utilizing the fluorescent properties of the CPE.

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