| 摘要 |
This invention relates to the controlled crystallization of magnetite to form superparamagnetic nanoparticles. The particles are highly crystalline magnetite in the 10 to 250 nm, 10 to 200, 20-200 and preferably 50 to 150 nm diameter range, exhibiting superparamagnetic characteristics with a saturation magnetization of 62 emu/g. The particles are stabilized with a coating such as dextran. These particles have potential applications in biological cell separations, drug delivery and nondestructive clinical diagnosis. |
