Topic 4 - Nanoparticles Flashcards Preview

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Flashcards in Topic 4 - Nanoparticles Deck (5)
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1
Q

what is a nanoparticle?

A

A nanoparticle is a structure that is 1-100nm in size. It contains a few hundred atoms.

2
Q

Why do nanoparticles have very different properties compared to their bulk materials ?

A

This is due to their high surface area to volume ratio

3
Q

What happens when the sides of a cube have decreased by a factor of 10 ?

A

The surface area to volume ratio increases by 10

4
Q

Give 2 benefits of using zinc oxide nanoparticles in sun cream

A

They give better skin coverage

They don’t degrade on exposure to the sun

5
Q

Give 2 risks of using nanoparticles

A

Harmful effects on the environment

potential to damage cells in your body