Nanoparticles

Question 1

What is the diameter of coarse particles

Answer 1

2,500nm - 10,000nm

Question 2

What is the diameter of fine particles

Answer 2

100nm - 2,500nm

Question 3

What is the diameter of nanoparticles

Answer 3

1nm - 100nm

Question 4

Conversion from nanometers (nm) to meters

Answer 4

1nm = 0.000 000 001m
1,000,000,000nm = 1m

Question 5

What area of science investigates nanoparticles

Answer 5

Nanoscience

Question 6

Do nanoparticles have a large of small surface area to volume ration

Answer 6

Large

Question 7

What happens to surface area to volume ratio as particles decrease in size

Answer 7

It increases

Question 8

What can nanoparticles be used for

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Answer 8

-catalysts
-nanomedicine
-conduct electricity
-clothes
-sterilising
-cosmetics

Question 9

How are nanoparticles used as catalysts

Answer 9

-they have a large surface area to volume ratio
-so are effective catalysts

Question 10

How are nanoparticles used in nanomedicine

Answer 10

-tiny particles (eg fullerenes) are absorbed more easily into the body
-so they can deliver drugs directly to cells

Question 11

How are nanoparticles used in electricity

Answer 11

-they can conduct electricity so can be used in tiny electric circuits for computer chips

Question 12

How are nanoparticles used in sterilising

Answer 12

-silver nanoparticles have antibacterial properties
-they can be added to polymer fibres that ate used to make surgical masks or wound dressing

Question 13

How are nanoparticles used in cosmetics

Answer 13

-used in things like sun creams as they protect the skin for uv rays

Question 14

Effects of nanoparticles on health

Answer 14

-we do not fully understand how they affect the body
-we don’t know the long term impacts on health

Question 15

Use of nanoparticles in sun cream

Answer 15

-they are better at protecting skin from uv rays
-they give better coverage than traditional sun creams