The small magnetic structures enhance medical science, Small magnetic objects that are successfully used in technology applications such as promising data storage in biomedicine.
Magnetic nanostructures have interesting properties that promote new applications in medical diagnostics and enable research in new therapeutic techniques.
A very interesting advance concerns the exotic configuration of the nanoscale, known as the vortex state, where magnetic moments are arranged in curly geometry. Now the new small magnetic structures enhance medical science.
Isolation and separation of cells from blood or tissue samples are very important for various medical applications such as gene therapy or cancer diagnosis and treatment. Standard procedures include screening and centrifugation, but cells of similar size or density cannot be separated in this way.
One approach to this problem is to cover the spherical iron oxide ball with antibodies that specifically bind to the desired cells. Desired cells are then separated by applied magnetic fields.
However, this may require high magnetic field strength, so a second approach using nano conductors has been tried.
The third method involves nanoplate either in a vortex state or in a synthetic antiferromagnetic configuration consisting of two ferromagnetic layers separated by a single non-magnetic layer. small magnetic structures enhance medical science.
The surface of the small structure can be treated with a fluorescent probe so the researchers can observe the movement of particles in response to the applied field. Another biomedical application that can benefit from magnetic nanostructures is NMR. Because basic technology has low sensitivity, contrast agents are usually needed.
The most commonly used agent is the gadolinium complex, but they have raised concerns about toxicity.
Both nanodisk and nanosheet which are coated with biocompatible substances have properties that will make them good MRI contrast agents. The innovative field of application of magnetic nanostructures is the destruction of targeted cancer cells.
Nanotubes made in a circling state or in synthetic antiferromagnetic configurations hold promise for this application.
A high tumor cell death rate of up to 90% is observed in a relatively weak magnetic field.
The mechanism that leads to cell death is the strong mechanical strength obtained when the rotating magnetic field rotates the nanosheets and destroys the tumor cells in it. Most of this study has been done in the laboratory, so some situations, such as retention or excretion from internal organs or capillary transport, can still be a problem. Further research is needed to overcome this effect in the real world.