Applications, magnetic properties biocompatibility

Magnetic biomaterials have different constraints than materials used for other applications. In vivo (in the body) applications require strict biocompatibility. In vitro (outside of the body) applications have less strict requirements, but techniques involving living cells still must consider the effect of the materials on the sample under study. In addition to biocompatibility, materials must be capable of being functionalized with one or more molecules, must retain their magnetic properties for a reasonable period of time in aqueous media with varying pH, must not be cleared too quickly from the bloodstream, and must form stable, non-aggregating dispersions [12, 13]. 

In a similar manner, several nanoparticles have been produced in the presence of block copolymers in selective solvents so as to form micelles that encapsulate particles such as metal salts. Consequently, these micelles are chemically converted to finely disperse colloidal hybrid polymer/metal particles with interesting catalytic, non-linear optic, semiconductor and magnetic properties [1, 20]. Finally, another area of potential application of amphiphilic block copolymers is that involving surface modification through the adsorption of block copolymer micelles or film formation. The use of a suitable micellar system allows for the alteration of specific surface characteristics, such as wetting and biocompatibility, or even enables the dispersion and stabilisation of solid pigment particles in a liquid or solid phase [1, 178]. 

Nanotechnology has improved the technical properties of fibres in textiles and coatings in such areas as electrical conductivity, magnetic susceptibility, interaction with light, photonics, chemical protection, friction control, abrasion resistance, waste water and oil repellence, soil release and biocompatibility. Tailoring and controlling structures on the nano-scale level is a key factor in the development of advanced materials or structural components in multifunctional applications. Some finishing processes in... 

Magnetic particles have a significant role in nanotechnology due to their surface properties and their applicability in physical and chemical processes like ionic exchange, specific complexation, biocompatibility and bioactivity, capacity of selection and transport for cells and chemical compounds (Safarik Safarikova, 2002). 

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