Disclosed are magnetic nanoparticles and methods of using magnetic nanoparticles for selectively removing biologics, small molecules, analytes, ions, or other molecules of interest from liquids.

The present invention relates to a method for manufacturing a light extraction substrate for an organic light-emitting diode and, more specifically, to a method for manufacturing a light extraction substrate for an organic light-emitting diode, capable of increasing light extraction efficiency and structural stability of an organic light-emitting diode by improving the dispersibility of light scattering particles, distributed inside a matrix layer, and substrate adhesion. To this end, the present invention provides a method for manufacturing a light extraction substrate for an organic light-emitting diode, the method comprising: a first mixing step of mixing transparent magnetic nanoparticles with a volatile first solution; a second mixing step of mixing, with a second solution including nonmagnetic oxide particles, a mixed liquid formed through the first mixing step and light scattered particles; a coating step of coating a base substrate with a coating solution formed through the second mixing step; and a magnetic field application step of applying a magnetic field to the coating solution side on the lower part of the base substrate so as to magnetically align the transparent magnetic nanoparticles included inside the coating solution.

The present invention relates to a method for manufacturing a light extraction substrate for an organic light-emitting diode and, more specifically, to a method for manufacturing a light extraction substrate for an organic light-emitting diode, capable of increasing light extraction efficiency and structural stability of an organic light-emitting diode by improving the dispersibility of light scattering particles, distributed inside a matrix layer, and substrate adhesion. To this end, the present invention provides a method for manufacturing a light extraction substrate for an organic light-emitting diode, the method comprising: a first mixing step of mixing transparent magnetic nanoparticles with a volatile first solution; a second mixing step of mixing, with a second solution including nonmagnetic oxide particles, a mixed liquid formed through the first mixing step and light scattered particles; a coating step of coating a base substrate with a coating solution formed through the second mixing step; and a magnetic field application step of applying a magnetic field to the coating solution side on the lower part of the base substrate so as to magnetically align the transparent magnetic nanoparticles included inside the coating solution.

The methods of the invention employ targeted magnetic particles, preferably targeted nanomagnetic particles, and targeted buoyant particles such as buoyant microparticles and microbubbles. Among the benefits of the invention is the ability to combine targeted magnetic particles with differentially targeted buoyant particles to achieve separation of two or more specifically cell targeted populations during the same work flow.

The methods of the invention employ targeted magnetic particles, preferably targeted nanomagnetic particles, and targeted buoyant particles such as buoyant microparticles and microbubbles. Among the benefits of the invention is the ability to combine targeted magnetic particles with differentially targeted buoyant particles to achieve separation of two or more specifically cell targeted populations during the same work flow.

The present invention relates to novel processes for recovering iron values from the bauxite residue. It comprises drying the red mud either directly or after neutralizing or after water washing. The bauxite residue was treated with iron nanoparticles of varying the size from 100-1000 nm, heating in muffle furnace or inductive furnace at the temperature 700-800° C. The invention resulted in increasing in magnetic properties of a selected species by coating of the iron particles on their surfaces. The iron oxides Fe.sub.2O.sub.3 and α-FeOOH (goethite) present in the bauxite residue was converted to Fe.sub.3O.sub.4 (magnetite) after the treatment using inductive heating. Hence, magnetic susceptibility of the particles enhances and can be separated by magnetic separator and ultimately separated from the nonmagnetic material. Furthermore, the isolated iron enriched material was used for various applications such as reduction of arsenic, chemical oxygen demand (COD) in wastewater.

The present invention relates to novel processes for recovering iron values from the bauxite residue. It comprises drying the red mud either directly or after neutralizing or after water washing. The bauxite residue was treated with iron nanoparticles of varying the size from 100-1000 nm, heating in muffle furnace or inductive furnace at the temperature 700-800° C. The invention resulted in increasing in magnetic properties of a selected species by coating of the iron particles on their surfaces. The iron oxides Fe.sub.2O.sub.3 and α-FeOOH (goethite) present in the bauxite residue was converted to Fe.sub.3O.sub.4 (magnetite) after the treatment using inductive heating. Hence, magnetic susceptibility of the particles enhances and can be separated by magnetic separator and ultimately separated from the nonmagnetic material. Furthermore, the isolated iron enriched material was used for various applications such as reduction of arsenic, chemical oxygen demand (COD) in wastewater.

Methods for producing engineered exosomes and other vesicle-like biological targets, including allowing a target vesicle-like structure to react and bind with immunomagnetic particles; capturing the immunomagnetic particle/vesicle complex by applying a magnetic field; further engineering the captured vesicles by surface modifying with additional active moieties or internally loading with active agents; and releasing the engineered vesicle-like structures, such as by photolytically cleaving a linkage between the particle and engineered vesicle-like structures, thereby releasing intact vesicle-like structures which can act as delivery vehicles for therapeutic treatments.

Methods for producing engineered exosomes and other vesicle-like biological targets, including allowing a target vesicle-like structure to react and bind with immunomagnetic particles; capturing the immunomagnetic particle/vesicle complex by applying a magnetic field; further engineering the captured vesicles by surface modifying with additional active moieties or internally loading with active agents; and releasing the engineered vesicle-like structures, such as by photolytically cleaving a linkage between the particle and engineered vesicle-like structures, thereby releasing intact vesicle-like structures which can act as delivery vehicles for therapeutic treatments.

A method for magnetic cellular manipulation may include contacting a composition with a biological sample to form a mixture. The composition may include a plurality of particles. Each particle in the plurality of particles may include a magnetic substrate. The magnetic substrate may be characterized by a magnetic susceptibility greater than zero. The composition may also include a chargeable silicon-containing compound. The chargeable silicon-containing compound may coat at least a portion of the magnetic substrate. The biological sample may include cells and/or cellular structures. The method may also include applying a magnetic field to the mixture to manipulate the composition.