C2.2.4 - Nanoparticles Flashcards Preview

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Flashcards in C2.2.4 - Nanoparticles Deck (8)
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1

How many atoms does a nanoparticle contain?

Few hundred

2

How big is a nanoparticle?

1nm - 100nm

3

What is a material made from nanoparticles described as?

Nanoparticulate

4

What does the small size of nanoparticles make them useful for?

New paints
New cosmetics, medicines and sunscreens

5

What are most of a nanoparticle's properties due to?

Its large (surface area : volume) ratio

6

Name examples of how nanoparticle properties can be used.

New catalysts to speed us industrial chemical reactions
Self-cleaning ovens, windows and clothes

7

How may nanoparticles be a risk to our health?

They are so tiny they can be breathed in, absorbed by the skin or pass through the cells

8

How may nanoparticles be a risk to the environment?

They may take a long time to break down once released into the environment, and toxic substances may stick to their surfaces.