In this chapter you will learn:

  1. Properties of nanoparticles

  2. Uses of nanoparticles

  3. Risk of nanoparticles

Properties of Nanoparticles

  • The properties of nanoparticulate material are different from those of the same properties in bulk.

  • A nanoparticle is usually a small particle that ranges between 1 to 100 nanometres in size.

  • Nanoparticles are 100 times larger than the zink atom.

  • Nanoparticles are much smaller than fine particles.

  • Nanoparticles have very large surface area to volume ratios. This gives them different properties and uses compared to larger materials that are made from the same substance.

  • Nanoparticles have high surface area, which allows them to act as great catalysts.

  • Nanoparticles are effective in very small quanitities because they have a large surface area to volume ratios.

Uses of Nanoparticles

  • Nanoparticles materials are used in sunscreens, paints, food packaging, solar cells, medical treatments and cosmetics.

  • Nanoparticles materials are also used in self-cleaning windows.

Risk of nanoparticles

  • Nanoparticles catalyse reactions more efficiently.

  • Nanoparticles could have adverse effects on human health.

  • Nanoparticles are small particles that can be inhaled or pass into cells.

  • Nanoparticles have generally toxic effect.

  • The effects of inhaled nanoparticles in the body may include lung damage.