Superparamagnetic nanoparticle

Composite materials are of interest due to the potential synergistic properties that may arise from the combination of two or more precursors. Two such precursors are wood or cellulose fibers and magnetic nanoparticles. These hybrid materials exhibit the inherent properties of the fiber substrate, in particular flexibility and strength, and also the magnetic properties of the surface bonded nanoparticles. Superparamagnetic Iron Oxide Nanoparticles (SPION) covered with a polymer have been used in medical research such as devices for cell isolation, immobilization of enzymes, controlled releasesystems and separation of biological... 

Cai, W. and Wan, J.Q. (2007) Facile synthesis of superparamagnetic magnetite nanoparticles in liquid polyols. Journal of Colloid and Interface Science, 305 (2), 366-370. 

Stevens, P.D., Li, G.F., Fan, J.D., Yen, M. and Gao, Y. (2005) Recycling of homogeneous Pd catalysts using superparamagnetic nanoparticles as novel soluble supports for Suzuki, Heck, and Sonogashira cross-coupling reactions. Chemical Communications (35), 4435-4437. 

Muller, K., Skepper, J.N., Posfai, M., Trivedi, R., Howarth, S., Corot, C., Lancelot, E., Thompson, P.W., Brown, A.P., and Gillard, J.H. (2007) Effect of ultrasmall superparamagnetic iron oxide nanoparticles (Ferumoxtran-10) on human monocyte-macrophages invitro. Biomaterials, 28 (9), 1629-1642. 

NeubergerT, Schopf B, Hofmann H, Hofmann M, von Rechenberg B (2005) Superparamagnetic nanoparticles for biomedical applications possibilities and limitations of a new drug delivery system. Journal of Magnetism and Magnetic Materials 293 483 196. 

More recently, electrostatic adsorption of Fe304 nanoparticles has been reported, showing superparamagnetism properties for the system [225]. 

Figure 1. MSC accumulate within the scar area. MSC fed with superparamagnetic iron oxide nanoparticles and injected into the border zone of infarcted myocardinm migrate into the infracted area.

A) Elaboration of PLLA-based superparamagnetic nanoparticles Characterization, magnetic behavior study and in vitro relaxivity evaluation Abstract. Oleic acid-coated magnetite has been encapsulated in biocompatible magnetic nanoparticles (MNP) by a simple emulsion evaporation method. 

Zhang H, Lee MY, Hogg MG et al (2010) Gene delivery in three-dimensional cell cultures by superparamagnetic nanoparticles. ACS Nano 4 4733 743... 

SUPERPARAMAGNETISM AND SPIN GLASS DYNAMICS OF INTERACTING MAGNETIC NANOPARTICLE SYSTEMS... 

At high temperatures, a nanoparticle is in a superparamagnetic state with thermal equilibrium properties as described in the previous section. At low temperatures, the magnetic moment is blocked in one potential well with a small probability to overcome the energy barrier, while at intermediate temperatures, where the relaxation time of a spin is comparable to the observation time, dynamical properties can be observed, including magnetic relaxation and a frequency-dependent ac susceptibility. 

Superparamagnetism and Spin Glass Dynamics of Interacting Magnetic Nanoparticle Systems By Petra E. Jonsson... 

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