23-01-2013, 05:16 PM
Nanoparticles have a very large surface area compared to their volume, so they are often able to react very quickly. This makes them useful as catalysts to speed up reactions. For example, they can be used in self-cleaning ovens and windows. However, there is also the possibility that they might speed up reactions in living things in unpredictable ways, perhaps causing illness or death.
