Magnetic nanopartides

Osaka, T., Matsunaga, T., Nakanishi, T., Arakaki, A., Niwa, D. and Iida, H. (2006) Synthesis of magnetic nanopartides and their application to bioassays. Analytical and Bioanalytical Chemistry, 384 (3), 593-600. 

Roca, A.G., Costo, R., Rebolledo, A.F., Veintemillas-Verdaguer, S., Tartaj, P., Gonzalez-Carreno, T., Morales, M.P. and Serna, C.J. (2009) Progress in the preparation of magnetic nanopartides for applications in biomedicine. Journal of Physics D Applied Physics, 42 (22), 11. 

Abu-Reziq, R., Alper, H., Wang, D.S. and Post, M.L. (2006) Metal supported on dendronized magnetic nanopartides highly selective hydroformylation catalysts. Journal of the American Chemical Society, 128 (15), 5279-5282. 

Zheng, Y., Stevens, P.D. and Gao, Y. (2006) Magnetic nanopartides as an orthogonal support of polymer resins applications to solid-phase Suzuki crosscoupling reactions. Journal of Organic Chemistry, 71 (2), 537-542. 

Laska, U., Frost, C.G., Price, G.J. and Pludnski, P.K. (2009) Easy-separable magnetic nanopartide-supported Pd catalysts kinetics, stability and catalyst reuse.Journal of Catalysis, 268 (2), 318—328. 

Supported ultra small palladium on magnetic nanopartides used as catalysts for Suzuki cross-coupling and Heck reactions. Advanced Synthesis and Catalysis, 349, 1917-1922. 

Stone et al. use this method to simultaneously synthesize the silica and entrap the butyrylcholinesterase which retains all its activity after the process of encapsulation, a high enzyme loading (90 %) is reached and the stability is increased [168]. The method has been further developed to simultaneously entrap catalase and horseradish peroxidase with inorganic magnetic nanopartides [169] which will fadlitate the separation [170,171]. 

Fig. 4. Magnetic cell separation. Left) Traditional method using large magnetic particles to bind to the cells. Right)The use of magnetic nanopartides that interact with the cell surface and thereby form large segregates that csm be collected with a magnetic trap.

As the different preparation methods lead to magnetic nanopartides with differences in crystalline structure, surface chemistry, shape, and so on, the fabrication technique will have a major influence on the magnetic properties of the materials... 

Other Metal Magnetic Nanopartides Synthesized by Methods of Colloidal Chemistry In the previous sections, the coUoidal synthesis of Co and CoPts nanocrystals and the great potential of an organometallic approach in the preparation of high-quality magnetic nanoparticles have been discussed. Yet, these synthetic... 

The preparation of core-shell -type magnetic nanopartides was reported [92,93] as a two-step synthesis in which nanopartides of one metal served as the seeds for growth of the shell from another metal. Thus, the reduction of platinum salts in the presence of Co nanopartides would allow the preparation of air-stable CocorePtsheii nanopartides [92]. The thermal decomposition of cobalt carbonyl in the presence of silver salt led to the formation of AgcoreCOgheii nanopartides [93]. The syntheses of these multicomponent magnetic nanostructures are discussed in Section 3.3.2.4. 

The self-organization phenomena in colloids of magnetic nanopartides (ferro-fluids) induced by external magnetic fields has attracted considerable attention on the basis of importance from both fundamental and applied perspectives [31]. However, the lack of systematic investigations, combined with some contradictory findings, have led to these materials remaining a relative novelty. Wirtz et cd. [32] have suggested that the formation of macroscopic 1-D periodic patterns composed of... 

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