Nanoparticles Flashcards
What is the approximate diameter of a nanoparticle?
1 nanometre - 100 nanometres
Can you see a nanoparticle with a normal microscope?
No
Nanoparticles are measured in which units?
Nanometres (nm)
How many nanometres are in 1 metre?
1 billion
What is a nanoparticle?
A tiny piece of substance made up of only a few hundred atoms
Why are nanoparticles special?
They have different properties to normal sized pieces on the same substance
What is it about nanoparticles that make them a special substance?
They have a huge surface area (More atoms on their surface)
What is meant by the properties of a substance?
It’s features
What is a carbon nanotube?
Cylinders of carbon atoms with 1 atom thick walls.
What is the diameter of a carbon nanotube?
1 nanometre
List some of the special properties of carbon nanotubes.
One of the strongest materials that exists
Extremely low density (light for their size)
Superconductors of heat.
Carbon nanotubes are used to make things such as…
Strong tennis racquet frames
Strong bicycle parts
Lightweight bullet proof vests
Waterproof phones
Wind turbines
What is meant by a composite material?
A material mixed with other materials to enhance it’s properties
Give some medical uses of nanoparticles.
Cancer drugs with no side effects
Bandages that detect infections
Magnetic treatments to destroy tumours
What do we call the use of nanoparticles to treat disease?
Nanomedicine
Sunscreen contains which type of nanoparticles?
Zinc oxide
Why is sunscreen containing zinc oxide nanoparticles better than that containing normal sized zinc oxide?
They look white on the skin
Are zinc oxide particles harmful to human health?
No
How can scientists carry out a valid (fair) test?
Keep control variables the same for every experiment
What is cholesterol?
A fatty deposit that can build up in blood vessels
What can high cholesterol lead to?
Heat disease
Heart attacks
Stroke
What is a dependant variable?
The thing that is recorded (measured)
How does the water and oxygen produced when petrol burns escape from the car?
They react with oxygen in the air
