Magnetic nanoparticles can be directed with a magnetic field, this
allows, for example, delivery of drugs to a tumor. Magnetic
nanoparticles also can improve the sensitivity of medical imaging
techniques that use magnetic signals.
A Survey of Magnetic Nanoparticle Applications
A method for early diagnosis of brain cancer under development uses magnetic
nanoparticles and nuclear magnetic resonance (NMR) technology. The
nanoparticles attach to particles in the blood stream called microvesicles
which originate in brain cancer cells. NMR is then used to detect these
microvesicle/magnetic nanoparticle clusters, allowing an early diagnosis.
Iron oxide nanoparticles can be used to improve Magnetic Resonance Imaging (MRI) of cancer tumors. The nanoparticle is coated with a peptide that binds to a cancer tumor.
Once the nanoparticles are attached to the tumor, the magnetic property of the
oxide enhances the images from the MRI scan.
Researchers at MIT have shown that
iron oxide nanoparticles in water can be used to
increase the amount of
heat transfer out of a system at localized hot spots.
The researchers believe this technique could be applied
to cooling a wide range of devices, from electronics
devices to fusion reactors.
Magnetic nanoparticles can attach to cancer cells in the blood
stream. These nanoparticles may allow doctors to remove
cancer cells before they
can establish new tumors.
Using nanoscavengers, in which a
layer of reactive nanoparticles coat a synthetic core which is designed to be
easily magnetized. The nanoparticles, for example silver nanoparticles if
bacteria is a problem, attach to or kill the pollutants. Then when a magnetic
field is applied the nanoscavengers are removed from the water.
Nanoparticles containing iron oxide that allows the nanoparticles to
directed, by a magnetic field, to stents. This could allow drugs to
be delivered directly to stents placed in arteries.
Iron oxide nanoparticles can used to improve MRI images of cancer tumors. The
nanoparticle is coated with a peptide that binds to a cancer tumor, once the
nanoparticles are attached to the tumor the magnetic property of the
iron oxide enhances the
images from the Magnetic Resonance Imagining scan.