Nanotechnology is a new branch of science that refers to structures
built from a few hundred atoms and are 1-100nm big. They show
different properties to the same materials in bulk, partly because they
also have a large surface area to volume ratio and their properties
could lead to new developments in computers, building materials
They are formed by a number of methods
Occur naturally in the sea
Formed during combustion
Formed by grinding down materials
Nanoscience and health
Nanoparticles are obviously very small and have a large
surface area to volume ratio. This makes them useful but can
also make them dangerous. Nanoparticles could easily pass
through cell membrane
Two examples of nanotechnology
The 'Nano Carbon Pro' tennis racket uses nanoparticles to increase its strenght
Silver nanoparticles can be used to give fibres antibacterial properties