nanoparticles and fullerene Flashcards
(17 cards)
What size are nanoparticles?
Between 1 and 100 nanometres.
Why do nanoparticles have different properties compared to larger particles?
They have a much larger surface area to volume ratio, making them more reactive.
Name two uses of nanoparticles.
Medicine (drug delivery) and cosmetics (sunscreens).
: What is one risk associated with nanoparticles?
They may be harmful to health or the environment.
What does “surface area to volume ratio” mean?
It is the amount of surface area compared to the volume of a particle, affecting how reactive it is.
What is a fullerene?
A fullerene is a molecule made entirely of carbon atoms arranged in a hollow, cage-like structure, often in the shape of a sphere or tube.
Q: What are fullerenes made of?
Carbon atoms arranged in a hollow cage-like structure.
What shape is the C₆₀ fullerene molecule?
It resembles a soccer ball made of hexagons and pentagons.
Fullerenes are allotropes of which element?
Carbon
Give one use of fullerenes.
Used in drug delivery to carry medicine inside the body.
Why are fullerenes considered nanoparticles?
Because their size is between 1 and 100 nanometres.
what’sthe most famous fullerene called
Buckminsterfullerene
What is Buckminsterfullerene made out of?
C60
what’s nanoscience
Nanoscience studies structures sized between 1 and 100 nanometres (nm), which are about a few hundred atoms in size.
advantage of nanoparticels
More reactive: Because of their large surface area to volume ratio, they can speed up chemical reactions.
Efficient: Smaller amounts are needed to achieve the same effect as larger particles.
Medical uses: Can deliver drugs directly to targeted cells, improving treatment.
Improved products: Used in sunscreens, cosmetics, electronics, and catalysts.
New technologies: Help develop stronger, lighter materials and advanced sensors.
Disadvantages of Nanoparticles
Health risks: Potential unknown effects if inhaled or absorbed by the body.
Environmental impact: Could harm wildlife or ecosystems if released.
Lack of long-term studies: Scientists are still researching their safety.
Cost: Can be expensive to produce and use.
✅ Why do carbon nanotubes conduct electricity?
carbon nanotubes conduct electricity because:
Each carbon atom forms three covalent bonds, leaving one free (delocalised) electron.
These delocalised electrons can move along the tube like in metals.
This movement of electrons allows electric current to flow through the nanotube.
