Magnetite nanoparticles applications

Micro- and nanobeads with magnetic properties have recently become popular since these tools can be manipulated, e.g., collected in the region of interest. Magnetite nanoparticles are introduced in order to render the polymeric beads magnetic. Preparation and application of magnetic beads will be discussed in more detail in Sect 5.5. 

Kim, D.K. et al., Biomedical application of ferrofluids containing magnetite nanoparticles, in Materials Resource Society Symposium Proceedings, Vol. 676, Materials Research Society, Warrendale, PA, 2001, p. 1, cited after [1313]. 

Preparation of Size-Controlled (30-100 nm) Magnetite Nanoparticles for Biomedical Applications... 

Nishio, K., Ikeda, M., Gokon, N., et al. (2007). Preparation of size-controlled (30-100nm) magnetite nanoparticles for biomedical applications. J. Magn. Magn. Mater., 310, 2408-2410. 

Immobilization of GpdQ on modified magnetite nanoparticles and of biomimetics attached to resins will be presented. Comprehensive characterization of activity and properties of the immobilized systems will be conducted as a starting point for future applications of these systems in bioremediation (Chap. 8). 

The next chapter will present an overview on how model complexes can, potentially, be used in applications for water decontamination by attaching them to insoluble polymers, for example, Merrifield resin. In addition, GpdQ will be immobilized onto dendrimer-modified magnetite nanoparticles to generate a potentially recyclable organophosphate bioremediation system. 

More widely applicable acylation of ortho-unsubstituted benzoic acids using a catalytic amount of magnetite nanoparticle and aliphatic carboxylic acids as acyl source can be realized (Scheme 4.36) [41]. 

By placing a drop of their ferrofluid on a small piece of paper, stndents can observe another application of ferrofluids - as a magnetic ink. Ferrofluids stain the paper and the magnetite nanoparticles become embedded in the cellnlose paper material. The attraction of the magnetite towards a magnet can lift the paper. Magnetic inks such as this are part of the anti-counterfeiting measnres found in U. S. currency 24). 

Due to the special magnetic properties of the magnetite nanoparticles used, especially in combination with polymers [4-6], the potential for further research is quite extensive. Therefore, research areas can be found in the field of functional materials and magnetic fluids applied in frictionless dynamic systems, e.g. for sealing of fast-rotating shafts, in the semiconductor industry, in vibration dampers, and in tweeters [7, 8], In addition, possible areas of technical application are coatings and composite materials [9, 10] utilized in chemical reactors as magnetically separable catalyst materials [11], as well as in the biomedical field [12-14],... 

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