Nanomaterials, also called ultrafine particle materials, are materials that have at least one dimension in a three-dimensional space. Its particle size is in the area where the atomic clusters are connected to the macroscopic object, and it has the advantages of large surface area, extremely small particle size, many surface active sites, high activity, high catalytic efficiency, and strong adsorption capacity. This makes the properties of nanomaterials in terms of heat, optics, magnetism, electricity, mechanics and chemistry significantly different from those of large-particle solid materials, and is known as the "most promising material in the 21st century."

Due to its excellent antibacterial effect, nano-silver solution has been widely used in various medical, packaging, electronics and other industries. For example, some scalpels are covered with a layer of nano silver, the thickness of which is 6 atoms arranged together. Nano silver has a good effect on killing common Escherichia coli and Neisseria gonorrhoeae.

Nano silver solution as an antibacterial material has many excellent characteristics.

First of all, the safety of Nano Silver Solution is very high. Compared with silver ions, nano-silver shows strong antibacterial properties at very low concentrations (nanomolar or micromolar), but it has very low toxicity to mammals and rarely causes complications.

Second, it has good durability. The nano silver solution can be loaded on a carrier such as chitosan to continuously release zero-valent silver ions, maintain a relatively stable silver concentration, and achieve the purpose of long-lasting antibacterial.

Third, nano-silver is antibacterial. Nano silver solution can effectively inhibit more than 650 pathogens such as Pseudomonas aureus, Staphylococcus, Escherichia coli, Pseudomonas aeruginosa and dermatophytes, and can even kill dead HIV-1.

Fourth, nano-silver solution is not easy to produce drug resistance. Bacteria treated with nanosilver basically cannot survive, which can prevent the bacteria from developing resistance.

Fifth, the nano-silver solution has the advantages of small side effects and convenient use.

Nano Silver mainly kills single-celled organisms. The combination of nano silver and oxygen metabolism enzymes inactivates the enzymes and suffocates the pathogen to death. Multicellular bodies do not use proteases for respiration. Silver itself is highly toxic to the human body. Even if nano silver is taken orally, the silver content is very small (a few thousandths of the tolerable dose), so it has almost no effect on the human body. At least there is no problem with external use. However, the properties of metals or their compounds generally change at the nanometer level.

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