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What are magnetic nanoparticles?

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Quick Answer

Magnetic nanoparticles are minute pieces of matter, ranging in size from 1 to 100 nanometers, that are affected by magnetic fields. Magnetic nanoparticles vary depending on how they were synthesized or produced, and they all have different chemical structures. As an example, some metal elements such as cobalt, iron and nickel are made up of magnetic nanoparticles.

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The three main types of magnetic nanoparticles are oxides, metallic and metallic with a shell. Ferrite is the most used of all the oxide magnetic nanoparticles. At a certain size, these particles undergo superparamagnetism, which means that there is no net magnetization.

The second type of magnetic nanoparticles are metallic; this type includes iron or cobalt nanoparticles. The third type of magnetic nanoparticles are metallic with a shell. For instance, there is a cobalt nanoparticle with a graphene shell. The graphene shell is made of carbons, protecting the reactive core. This not only increases the nanoparticle's magnetization, but it keeps it more stable than the other two types.

Magnetic nanoparticles have many uses in health, medicine and technology. For instance, these particles attach themselves to cancer cells in order to remove the cells from the body. These particles are also important when it comes to data storage.

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