Silver nanoparticle

Silver nanoparticles (pronunciation: /ˈsɪlvər ˌnænoʊˈpɑːrtɪkəl/) are particles of silver of between 1 nm and 100 nm in size. While frequently described as being 'silver' for color, they come in a range of colors depending on the environment.

Etymology

The term "nanoparticle" derives from the Greek nano, meaning "dwarf", and particle, from the Latin particula, meaning "a little part". The prefix "nano" is used in the International System of Units to denote a factor of 10⁻⁹. The term "silver" comes from the Old English seolfor, which has a Germanic origin.

Synthesis

Silver nanoparticles can be synthesized through several methods, including chemical reduction, biological synthesis, and photochemical methods. The choice of synthesis method can influence the properties of the silver nanoparticles, such as their size, shape, and stability.

Applications

Silver nanoparticles have a wide range of applications due to their unique properties. They are used in medicine, electronics, catalysis, and sensing. In medicine, they are used for their antibacterial, antiviral, and anti-inflammatory properties. In electronics, they are used in conductors, sensors, and batteries. In catalysis, they are used to speed up chemical reactions. In sensing, they are used in biosensors and chemical sensors.

Safety and environmental concerns

There are concerns about the safety and environmental impact of silver nanoparticles. They can be toxic to humans and the environment, especially when they accumulate in the body or the environment. Therefore, it is important to handle them with care and to dispose of them properly.

External links

Medical encyclopedia article on Silver nanoparticle
Wikipedia's article - Silver nanoparticle

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Silver nanoparticle