special materials Flashcards
(17 cards)
what is graphene
a single layer of graphite
what properties make graphene useful in electronics and composite material
strong, good thermal and electrical conductor, nearly transparent
what are 2 uses of fullerenes
drug delivery and catalysis
What shape is a Buckminsterfullerene molecule?
spherical
a lubricant is a substance that allows materials to move over each other easily.
suggest why Buckminsterfullerene is a good lubricant
molecules are spherical so they will roll
what shape is carbon nanotubes and and what are they useful for
shape- cylindrical fullerenes
used for use in nanotechnology ad electronics
why are fullerenes used to make tennis rackets
so they’re strong but still light weight
what is 1 property of a fullerene
large surface area to volume ratio
what is the size of a nanoparticle
1nm and 100nm
what are plastics
polymers
why are polymers solid are room temperature
intermolecular forces between large polymers are strong
what is a polymerisation reaction
cheap and strong and used to make plastic bottles and bags
state the uses of nanoparticles
medicines
deodorant
sun creams
how are the properties of nanoparticles different to the same material in bulk
nanoparticles are more sensitive to light, heat and magnetism
suggests 1 reason why it costs less to use nanoparticles rather than fine particles in sun creams
-greater surface area to volume ratio
-less can be used
why are nanoparticles used in sun creams
provide better skin coverage, so there’s more effective protection from the suns harmful ultraviolent rays
what potential problems could nanoparticles cause
damage to human cells
