Give evidence of use of nanoparticles by humans in ancient times with

1.	Give evidence of use of nanoparticles by humans in ancient times with appropriate examples.
Answer» There is enough evidence that nanomaterials have been produced and used by humans in ancient times. For example : Gold and silver nanoparticles trapped in the glass matrix gives ruby red colour in some ancient glass paintings. The decorative glaze or metallic film known as lustre found on some medieval pottery is due to certain spherical metallic nanoparticles. Carbon black is a nanostructured material that is used in tyres of car to increase the life of tyre. (Discovery in 1900). Carbon nanotubes are made up of graphite sheets with nanosized diameter. They have highest strength. Fumed silica, a component of silicon rubber, coatings, sealants and adhesives is also a nanostructured material.

Give evidence of use of nanoparticles by humans in ancient times with appropriate examples.

Answer»

There is enough evidence that nanomaterials have been produced and used by humans in ancient times.

For example :

Gold and silver nanoparticles trapped in the glass matrix gives ruby red colour in some ancient glass paintings.
The decorative glaze or metallic film known as lustre found on some medieval pottery is due to certain spherical metallic nanoparticles.
Carbon black is a nanostructured material that is used in tyres of car to increase the life of tyre. (Discovery in 1900). Carbon nanotubes are made up of graphite sheets with nanosized diameter. They have highest strength.
Fumed silica, a component of silicon rubber, coatings, sealants and adhesives is also a nanostructured material.