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Magnetic Nanoparticles

wallpapers Tech 2020-12-14
Nanoparticles refer to particles with a particle size between 1-100nm (nanoparticles are also called ultrafine particles). It belongs to the category of colloidal particle size. They are in the transition zone between clusters of atoms and macroscopic objects, between the microscopic system and the macroscopic system. They are groups composed of a small number of atoms or molecules, so they are neither typical microscopic systems nor typical macroscopic systems.
 
Magnetic particles
 
The magnetic nanoparticles developed by a research team at the University of Buffalo are only 6 nanometers in size, which can easily diffuse between cells. The researchers first fix the nanoparticles on the cell membrane, and then use a high-frequency magnetic field to heat them to stimulate the cells. In view of the fact that this method can stimulate cells evenly over a large area, scientists believe that this method can be used in the human body in the future.

 
Researchers have now demonstrated that this method can open calcium ion channels, activate nerve cells cultured through cells, and even manipulate the movement of tiny nematodes. When the researchers fixed the magnetic nanoparticles to the mouth of the nematode, the nematode just crawled around at first. However, when scientists heated the magnetic nanoparticles to 34 degrees Celsius, they were able to control the advance and retreat of the nematode.

The research team also invented a fluorescent probe that can measure whether nanoparticles are heated to 34 degrees Celsius based on changes in fluorescence intensity. This fluorescent probe can be said to be a nanometer thermometer.
 
This research has a wide range of applications. For example, in cancer treatment, scientists can perform remote operations on selected proteins or specific tissues to develop new cancer treatment methods. In addition, in the treatment of diabetes, it can also remotely stimulate pancreatic cells to release insulin. This method can also be applied to certain neurological diseases caused by insufficient stimulation.
 
Scientists said this method is very important, because it only heats the cell membrane, and the temperature inside the cell does not change, so it will not cause cell death. By developing this method, scientists can use magnetic fields to stimulate cells in vitro and in vivo, help understand cell signaling networks, and control animal behavior.

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