Magnetotactic bacteria
A review of magnetotactic bacteria and the magnetite crystals (magnetosomes) they grow.
As reported in: Faivre, Schüler (2008). Magnetotactic Bacteria and Magnetosomes. Chemical Reviews. doi:10.1021/cr078258w
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Magnetite: uses in research
Also: iron oxide, Fe3O4, magnetosomes
Magnetite is a naturally magnetic iron oxide. Some bacteria even grow chains of magnetite crystals to navigate. As nanoparticles it is studied for imaging, drug delivery, cancer heat therapy and pollutant removal. Biomedical entries are descriptive only.
Readiness: lab lab studies · prototype demonstrated objects · commercial products or buildings in real use · review summaries of other studies.
biology
biomedical
Magnetic fluid hyperthermia
Described magnetic fluid hyperthermia, heating superparamagnetic nanoparticles with an AC magnetic field to treat cancer.
As reported in: Jordan, Scholz, Wust et al. (1999). Magnetic fluid hyperthermia (MFH): Cancer treatment with AC magnetic field induced excitation of biocompatible superparamagnetic nanoparticles. Journal of Magnetism and Magnetic Materials. doi:10.1016/s0304-8853(99)00088-8
Abstract only
Magnetite-silica imaging particles
Uniform nanoparticles with a magnetite core and mesoporous silica shell for MRI and fluorescence imaging and drug delivery.
Built / tested: nanoparticles
As reported in: Kim, Kim, Lee et al. (2008). Multifunctional Uniform Nanoparticles Composed of a Magnetite Nanocrystal Core and a Mesoporous Silica Shell for Magnetic Resonance and Fluorescence Imaging and for Drug Delivery. Angewandte Chemie International Edition. doi:10.1002/anie.200802469
environment
Humic acid on magnetite
Studied how humic acid adsorption affects surface charge and clumping of magnetite nanoparticles.
As reported in: Illés, Tombácz (2006). The effect of humic acid adsorption on pH-dependent surface charging and aggregation of magnetite nanoparticles. Journal of Colloid and Interface Science. doi:10.1016/j.jcis.2005.08.003
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nanotechnology
Size-controlled magnetite nanoparticles
A method for size-controlled synthesis of magnetite nanoparticles.
Built / tested: nanoparticles
As reported in: Sun, Zeng (2002). Size-Controlled Synthesis of Magnetite Nanoparticles. Journal of the American Chemical Society. doi:10.1021/ja026501x
Abstract only