Polyurea microcapsules with a photocleavable shell: UV-triggered release

Infrared laser triggered release of bioactive compounds from single hard shell microcapsules.

Micro composites are commonly characterized in bulk. Here we study the temperature triggered release of a bioactive compound from single isolated microcapsules. We monitor the release process in real-time using a novel thermal microscopy method combining laser-induced heating and fluorescence imaging.

Core–Shell Microcapsules With Embedded Microactuators for Regulated Release

Core–shell microcapsules capable of regulating the release profile of encapsulated molecules are developed. These microcapsules uniquely embed miniature actuators in their liquid core. The internal actuators are made of stimuli-responsive smart hydrogel beads. The embedded hydrogel beads swell in response to external electric fields, regulating the internal pressure of the liquid core and thus ...

Biodegradable polymeric microcapsules for selective ultrasound-triggered drug release

Polyurea microcapsules in microfluidics: surfactant control of soft membranes.

Interfacial polymerization techniques offer a versatile route for microcapsule synthesis. We designed a microfluidic process to synthesize monodisperse polyurea microcapsules (PUMCs); the microcapsules are formed by an interfacial polymerization of isocyanate dissolved in the oil and an amine dissolved in water. We measure the mechanical properties of the capsule as well as transport properties...

Controlling the morphology of polyurea microcapsules using microfluidics.

We use microfluidics to continuously produce monodisperse polyurea microcapsules (PUMCs) having either aqueous or nonaqueous cores. The microcapsule shells are formed by the reaction between an isocyanate, dissolved in oil, and an amine, dissolved in water, at the surface of oil-in-water or water-in-oil drops immediately as they are formed. Different microcapsule morphologies can be generated u...