nanotech Flashcards
what is a nanoscale
refers to materials that are between 1 and 100 nanometres across
how much is a nanometer
1 billionth of a metre
human hair is 100,000 nm
silicon atomic is 0.2nm
what is a nano material
something that has a single units that exist at the nanoscale
what are the types of carbon nano materials
carbon nanotubes
graphene
c60 - buckyballs/fullrenes
what are nano particles
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.
useful types of nanoparticles
cosmetics and creams
suncreen and zinc - use nanoparticles of titanium dioxide to block sunlight
antibacterial clothing
antibacterial childrens toys
water proof clothing
what does titanium dioxide do in suncreen
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
