nanotech

Question 1

what is a nanoscale

Answer 1

refers to materials that are between 1 and 100 nanometres across

Question 2

how much is a nanometer

Answer 2

1 billionth of a metre
human hair is 100,000 nm
silicon atomic is 0.2nm

Question 3

what is a nano material

Answer 3

something that has a single units that exist at the nanoscale

Question 4

what are the types of carbon nano materials

Answer 4

carbon nanotubes
graphene
c60 - buckyballs/fullrenes

Question 5

what are nano particles

Answer 5

specifc type of nano material
- spherical particles with diameters of about 1 - 100nm
- at this size, the materials begin to react and behave differently
- greater surface area and tend to be more reactive.

Question 6

useful types of nanoparticles

Answer 6

cosmetics and creams
suncreen and zinc - use nanoparticles of titanium dioxide to block sunlight
antibacterial clothing
antibacterial childrens toys
water proof clothing

Question 7

what does titanium dioxide do in suncreen

Answer 7

the titanium dioxide crystals act like mirrors that reflect the sunlight

the particles are so small though that they are invisble to the human eye which is why you cant see it after it is rubbed in