Nanoparticles

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.