nanoscience

Question 1

What is nanoscience?

Answer 1

Science that studies particles that are 1 - 100nm in size

Question 2

State the uses of nanoparticles

Answer 2

• Medicine (drug delivery systems)
• Electronics
• Deodorants
• Sun creams (better skin coverage and more effective protection against cell damage)
• catalysts

Question 3

What are fine and coarse particles?

Answer 3

• Fine particles (soot), 100-2500 nm diameter, 1 x 10-7 m to 2.5 x 10-6 m
• Coarse particles, PM10 (dust), 1 x 10-5 nm to 2.5 x 10-6m

Question 4

Why do nanoparticles have different properties to those for the same materials in bulk?

Answer 4

High surface area to volume ratio, less nanoparticles needed compared to normal material sizes.

Question 5

What are the risks of using nanoparticles?

Answer 5

• nanoparticles may be absorbed into the body and enter our cells
• no one knows the effects of this