Naoparticles Flashcards
1
Q
How small is a nanometre
A
1x10 to the -9
2
Q
What happens when a cube becomes smaller in surface area
A
The surface area to volume ratio increases
3
Q
What is graphene
A
A sheet of carbon just one atom thick
4
Q
State the structure of graphene
A
Thin flat layer of hexagonal bonds of carbon
5
Q
State a use of graphene
A
Solar panels
6
Q
Why do nano particles have different properties than bulk materials
A
They have more atoms exposed to the surface
7
Q
Advantages of nano particle sunscreens
A
Colourless
Work as soon as they are applied
Do not degrade on exposure to the sun
8
Q
Disadvantages of nano particle sunscreens
A
They can go into the skin since they are so small
They are potentially harmful to the environment
Long term risks are not fully understood
