Styrene-coated iron nanobeads for medical use

• Published in: IEEE transactions on magnetics Vol. 41; no. 10; pp. 4117 - 4119
• Main Authors: Kuroda, C.S., Maeda, M., Nishibiraki, H., Matsushita, N., Handa, H., Abe, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.10.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Atmospheric measurements; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Iron; Magnetic analysis; Magnetic bead; Magnetic separation; Magnetism; Materials science; metallic iron; nanobead; Nanobioscience; Nanoparticles; Other topics in materials science; Particle measurements; Petroleum; Physics; polymer bead; Polymers; polystyrene bead; Saturation magnetization; Nanoparticles; Magnetic bead; polystyrene bead; nanobead; Polymers; metallic iron; polymer bead; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2005.855336

Spherical iron nanoparticles with a diameter of 10 nm were synthesized using a water in oil reverse micelle systems. The particles were encapsulated in styrene polymer by an emulsion polymerization method. The resulting beads were 150/spl plusmn/50 nm in diameter, having a saturation magnetization of 23.5 emu/g. The styrene-coated iron particles exhibited superparamagnetism, as measured by Mo/spl uml/ssbauer spectroscopy, and dispersed well in water. The saturation magnetization was higher than reported for commercially available polymer-coated micron sized beads.