Abstract: The invention comprises two key components: dielectrophoresis (DEP) and reversible binding surfaces. DEP has become an important tool for trapping dielectric particles. Moreover, DEP can manipulate cell movement as dictated by the intrinsic dielectric constant of the cell without modification. DEP therefore provides a mechanism by which to force targets in a flow channel to a reversible binding surface. By building selectivity into the binding surface, the capacity to choose which targets can be held after the dielectric field is turned off, providing a separation strategy that does not suffer from fouling issues, as large foulants can freely pass over the surface through the flow channel.

Abstract: The invention comprises two key components: dielectrophoresis (DEP) and reversible binding surfaces. DEP has become an important tool for trapping dielectric particles. Moreover, DEP can manipulate cell movement as dictated by the intrinsic dielectric constant of the cell without modification. DEP therefore provides a mechanism by which to force targets in a flow channel to a reversible binding surface. By building selectivity into the binding surface, the capacity to choose which targets can be held after the dielectric field is turned off, providing a separation strategy that does not suffer from fouling issues, as large foulants can freely pass over the surface through the flow channel.

Abstract: Localized drug delivery systems are effective means to administer therapeutic concentrations and controlled release of drugs. A delivery system consisting of non-ionic surfactant vesicles (niosomes) packaged within a biodegradable, temperature and pH sensitive hydrogel network was developed. Drug behaviors were modeled using a fluorescent dye with similar physical properties as therapeutic drugs for cancer. The niosomes were embedded into a biodegradable hydrogel providing a stable niosome environment. A cross linked chitosan was used as the hydrogel, which is a liquid at room temperature, and gels inside the body. Depending on the conditions to which individual niosomes are exposed, the release rate can be controlled to last from 24 hours to more than 3 months.

Abstract: Taught herein is a drug-delivery system that includes encapsulating a therapeutic drug in a nanoparticle vesicle that is then embedded into a hydrogel network. The system allows for enhanced, two-fold control over the release rate of the drug. This technology will be particularly advantageous in treating malignant cancer cells such as those found in the brain. The invention will allow for decreased side effects and increased survival time in patients. This invention opens the door to other technological applications that require controlled release of chemical substances.

Abstract: The invention comprises two key components: dielectrophoresis (DEP) and reversible binding surfaces. DEP has become an important tool for trapping dielectric particles. Moreover, DEP can manipulate cell movement as dictated by the intrinsic dielectric constant of the cell without modification. DEP therefore provides a mechanism by which to force targets in a flow channel to a reversible binding surface. By building selectivity into the binding surface, the capacity to choose which targets can be held after the dielectric field is turned off, providing a separation strategy that does not suffer from fouling issues, as large foulants can freely pass over the surface through the flow channel.