Title :
Styrene-coated iron nanobeads for medical use
Author :
Kuroda, Carlos S. ; Maeda, Masahito ; Nishibiraki, Hiroshi ; Matsushita, Nobuhiro ; Handa, Hiroshi ; Abe, Masanori
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan
Abstract :
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±50 nm in diameter, having a saturation magnetization of 23.5 emu/g. The styrene-coated iron particles exhibited superparamagnetism, as measured by Mössbauer spectroscopy, and dispersed well in water. The saturation magnetization was higher than reported for commercially available polymer-coated micron sized beads.
Keywords :
Mossbauer spectroscopy; emulsions; iron; materials preparation; nanoparticles; polymerisation; superparamagnetism; 10 nm; 150 nm; Mossbauer spectroscopy; emulsion polymerization; magnetic bead; medical use; nanoparticles; polymer bead; polystyrene bead; reverse micelle systems; saturation magnetization; styrene polymer; styrene-coated iron nanobeads; superparamagnetism; Atmospheric measurements; Iron; Magnetic analysis; Magnetic separation; Nanobioscience; Nanoparticles; Particle measurements; Petroleum; Polymers; Saturation magnetization; Magnetic bead; metallic iron; nanobead; nanoparticles; polymer bead; polystyrene bead;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855336
