Nonoparticles Flashcards
1
Q
They have a high…
A
Surface area to volume ratio.
SA:V
More reactive because of surface area.
2
Q
Size of a nanoparticle?
A
1-100 nanometers.
3
Q
How big is a nanometer?
A
1 nm = 0.000000001 m.
1*10 to the -9
4
Q
Another name for dust?
A
Coarse particles. (Nanoparticles can be 100 times smaller then the finest dust)
5
Q
They are highly reactive because of..?
A
The large number of atoms on the surface.
6
Q
Possible worries about nano particles?
A
Concerns about their environmental impact.
7
Q
Benefits of nanoparticles?
A
- Less substance is needed, so a more sustainable industry.
- Could cause skin damage
- Could be difficult to dispose of without damaging the environment
8
Q
Size of a micrometer?
A
1*10 to the -6
0.000001m
9
Q
Application of nanoparticles?
A
- Suncream - more effective
- Cosmetics - absorbs deeper into skin
- Nanocages - carry drugs inside, target tumours.
