Nanoparticles
Nanoparticles are extremely small particles between 1 and 100 nanometres that have different properties from bulk materials.
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Nanoparticles are extremely small particles between 1 and 100 nanometres that have different properties from bulk materials.
- They have a very large surface area to volume ratio
- Used in sunscreens and medicine
- Health effects are still being studied
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Nanoparticles?
Within Chemistry, which covers atoms, bonding, reactions, the periodic table, organic chemistry and the chemistry of everyday life, this topic explains Nanoparticles. Chemistry links what you can see in the lab to the particles and bonds behind it, so each topic here shows that link in a model.
Check that you can explain Nanoparticles in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Nanoparticles helps you explain why substances behave as they do, from cleaning products and food to medicines.
Nanoparticles in detail
Nanoparticles are structures between 1 and 100 nanometres in size (a nanometre is a billionth of a metre), containing only a few hundred atoms. They have a very large surface area compared with their volume, so they can behave differently from the same material in bulk.
Uses include sunscreens, which use titanium dioxide for clear UV protection, catalysts, antibacterial fabrics, deodorants and medicine. Concerns include their possible effects on health and the environment, as their long-term risks are not fully understood. Scientists weigh benefits against uncertainties.
How the interactive helps you understand Nanoparticles
Watch the atom model in the interactive. Use any sliders or buttons it offers to change the values and see how the atom model responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Nanoparticles.
Real-life uses and examples
- Link Nanoparticles to everyday products such as cleaning agents, food and medicines.
- Read a chemical equation or diagram and work out what Nanoparticles shows.
- Explain Nanoparticles in an exam by linking the particles involved to what you observe.
Common mistakes to avoid
- Mixing up the names of substances or ions when you describe Nanoparticles.
- Describing what happens without explaining the particles or bonds involved.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Nanoparticles
What is Nanoparticles?
Nanoparticles are extremely small particles between 1 and 100 nanometres that have different properties from bulk materials.
What are the most important points about Nanoparticles?
The main points are: They have a very large surface area to volume ratio; Used in sunscreens and medicine; Health effects are still being studied.
Why is Nanoparticles useful?
Understanding Nanoparticles helps you explain why substances behave as they do, from cleaning products and food to medicines.
How can I practise Nanoparticles?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Nanoparticles?
Related topics in Chemistry include Balancing Equations, The Mole, Concentration of Solutions.