| 摘要 |
Buoyant, sphere-like materials on the order of about 10 to about 300 microns and surrounded, at least in part, by (1) a variable blend of a ferromagnetic and paramagnetic material and (2) an absorbing or adsorbing material are effective vehicles for isolating targeted materials. By virtue of its relatively low density, the composite material is capable of remaining sufficiently suspended in solution for a suitable amount of time. In addition, the blend of ferromagnetic and paramagnetic materials allows for the isolation of a composite material from an environment such as a solution, yet discourages substantial self-attachment of the composite materials in solution, when subject to a magnetic field. Accordingly, multiple embodiments of composite materials having these and other properties are disclosed, as well as methods for making and using the same.
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