GCSE Chemistry revision

Uses of nanoparticles

Bulk and surface properties of matter including nanoparticles (chemistry only)

AQA 4.2.4.2 Foundation & Higher

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Nanoparticles can be used as catalysts to speed up the rate of chemical reactions.
Only the exposed surface area of a catalyst is active, so nanoparticles are far more efficient than larger particles of the same material.
Much less of a nanoparticle-based catalyst is needed compared to a bulk material, because nanoparticles offer more surface area for a given volume.

1. Nanoparticles as Catalysts AQA

Nanoparticles can be used as catalysts to speed up the rate of chemical reactions.
Only the exposed surface area of a catalyst is active, so nanoparticles are far more efficient than larger particles of the same material.
Much less of a nanoparticle-based catalyst is needed compared to a bulk material, because nanoparticles offer more surface area for a given volume.

Nanomedicine explores the use of nanoparticles to deliver drugs directly to cells inside the body.
Fullerenes, such as spheres made of carbon atoms, are being researched as vehicles to carry drugs to specific cells due to their tiny size.
Some nanoparticles can conduct electricity, making them potentially useful in creating very small electrical circuits and computer chips.
Silver nanoparticles have antibacterial properties and can be infused into surgical masks and wound dressings to reduce the risk of infection.

2. Uses in Medicine and Electronics AQA

Nanomedicine explores the use of nanoparticles to deliver drugs directly to cells inside the body.
Fullerenes, such as spheres made of carbon atoms, are being researched as vehicles to carry drugs to specific cells due to their tiny size.
Some nanoparticles can conduct electricity, making them potentially useful in creating very small electrical circuits and computer chips.
Silver nanoparticles have antibacterial properties and can be infused into surgical masks and wound dressings to reduce the risk of infection.

Nanoparticles used in sun creams provide better skin coverage, making them more effective at protecting against harmful UV rays.
However, it is currently unclear whether nanoparticles in sun cream can penetrate the skin and potentially damage cells.
The environmental impact of nanoparticles washing into the sea is also unknown, raising concerns about possible harm to ecosystems.

3. Nanoparticles in Sun Cream AQA

Nanoparticles used in sun creams provide better skin coverage, making them more effective at protecting against harmful UV rays.
However, it is currently unclear whether nanoparticles in sun cream can penetrate the skin and potentially damage cells.
The environmental impact of nanoparticles washing into the sea is also unknown, raising concerns about possible harm to ecosystems.

Nanotechnology is a relatively new field, meaning the full effects of nanoparticles on the human body are not yet fully understood.
There is currently no evidence that nanoparticles are harmful, but more thorough testing is needed before firm conclusions can be drawn.
Some scientists and regulators argue that nanoparticles should be more strictly regulated and that products containing them should be clearly labelled.

4. Risks and Concerns of Nanotechnology AQA

Nanotechnology is a relatively new field, meaning the full effects of nanoparticles on the human body are not yet fully understood.
There is currently no evidence that nanoparticles are harmful, but more thorough testing is needed before firm conclusions can be drawn.
Some scientists and regulators argue that nanoparticles should be more strictly regulated and that products containing them should be clearly labelled.