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.
Nanomaterials also have many applications in medicine and bioengineering. Targeted drugs with nano-magnetic materials as drug carriers have been successfully developed, called “biological missiles”. That is, the drug is carried on the surface of the protein coated with magnetic Fe3O4 nanoparticles, injected into the blood vessels of the human body, and delivered to the diseased part through magnetic field navigation to release the drug, which can reduce the side effects of the drug caused by the liver, spleen, and kidney.
The use of nano sensors can obtain various biochemical reaction information and electrochemical information. Nano-robots can also be developed by using nanoparticles to inject blood into the human body, perform whole-body health checks on the human body, dredge blood clots in the cerebrovascular, remove fatty deposits in the heart arteries, and even swallow viruses and kill cancer cells. It can be predicted, With the development of nanomaterials technology and functional development, more and more new nanomaterials will be widely used in many high-tech fields.