Nanoparticles

Question 1

What size are nanoparticles?

Answer 1

1-100 nm (the same size as a few hundred atoms or molecules)

Question 2

How big is a nanometre ( nm ) ?

Answer 2

10 ^ -9 m or 0.000000001 metres

Question 3

What are the uses of nanoscience?

Answer 3

Used in the cosmetic industry, especially in suncreams.

Question 4

Benefits of using nanoparticles in suncream

Answer 4

• Better skin coverage
• most effective protection from uv waves
• clear and colourless - invisible on the skin
• do not degrade on exposure ( no harm to skin )

Question 5

Risks of using nanoparticles in suncream

Answer 5

• Potential cell damage - nanopanticles are so small so they may be able to penetrate membranes or be breathed in
• harmful effects on environment

Question 6

What are the risks of nanoscience?

Answer 6

• Breathing in nanoparticles , cause inflammation of the lungs.
• nanoparticles may be absorbed into the blood stream.
• nanoparticles in the body may cause cell damage.