Submitted for the MAR11 Meeting of The American Physical Society Motion of Elastic Microcapsules on Compliant Surfaces with Adhesive Ligands EGOR MARESOV, GERMAN KOLMAKOV, ANNA BALAZS, University of Pittsburgh — By integrating mesoscale models for hydrodynamics, micromechanics and adhesion, we examine the fluid driven motion of elastic microcapsules on compliant surfaces. The capsules, modeled ...

The overall goal of this study was to fabricate multifunctional core-shell microcapsules with biological cells encapsulated within the polymer shell. Biocompatible temperature responsive microcapsules comprised of silicone oil droplets (multicores) and yeast cells embedded in a polymer matrix (shell) were prepared using a novel microarray approach. The cross-linked polymer shell and silicone mu...

This study proposes a new concept of pH-sensitive poly(lactide-co-glycolide) (PLGA) nanoparticle composite microcapsules for oral delivery of insulin. Firstly, insulin-sodium oleate complex was prepared by the hydrophobic ion pairing method and then encapsulated into PLGA nanoparticles by the emulsion solvent diffusion method. In order to reduce the burst release of insulin from PLGA nanopartic...

China) Abstract: The microencapsulated display device is the main choice for electrophoretic display. The application of environment friendly dispersion medium is very critical for the commercialization of this technology. The electrophoretic microcapsules using Isopar L, which is non-toxic, low aromatic concentration and volatility, as dispersion medium were prepared by complex coacervation be...

Robust and stable microcapsules are assembled from poly-amino acid-modified silk fibroin reinforced with graphene oxide flakes using layer-by-layer (LbL) assembly, based on biocompatible natural protein and carbon nanosheets. The composite microcapsules are extremely stable in acidic (pH 2.0) and basic (pH 11.5) conditions, accompanied with pH-triggered permeability, which facilitates the contr...

Microcapsule arrays attract a lot of interest due to their potential applications in sensing technology. A strategy for fabricating diverse microcapsule arrays through covalent linking is reported here. The self-assembly of microcapsules was directed by using a poly(allylamine hydrochloride) (PAH)-patterned template, which was created via microcontact printing. The microcapsules with PAH as the...

We report a simple approach to fabricate custom-shape microcapsules using hydrogel templates synthesized by stop flow lithography. Cargo-containing microcapsules were made by coating hydrogel particles with a single layer of poly-l-lysine followed by a one-step core degradation and capsule cross-linking procedure. We determined appropriate coating conditions by investigating the effect of pH, i...

Alginate-based scaffolds have received considerable attention for biomedical application because of their biocompatibility and ease of preparation. The application of alginate hydrogels for encapsulation of pancreatic islets is known as a potential treatment for type I diabetes. In this study, dextran-spermine coated microcapsules of alginate containing pancreatic islets were prepared, and then...

A novel form of microcapsules, which possess single hollow cavities and thickness-controllable shells, were prepared by a two-step emulsification, emulsion ripening, and suspension polymerization. Parameters on morphology control of water-in-oil-in-water (W/O/W) emulsion globules were particularly investigated in this study, and a universal strategy to prepare single-core water-in-oil (W/O) glo...

To date, optical manipulation techniques for aqueous dispersions have been developed that deposit and/or transport nanoparticles not only for fundamental studies of colloidal dynamics, but also for either creating photonic devices or allowing accurate control of liquids on micron scales. Here, we report that optical tweezers (OT) system is able to direct three-dimensional assembly of graphene, ...