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==Key Stage 4==
===Meaning===
[[Nanoparticles]] are small clumps of [[atom]]s which are between 1 and 100 [[nanometre]]s ([[billion]]ths billionths of a [[metre]]) in [[length]], [[width]] or [[height]].
===About Nanoparticles===
===Risks of Nanoparticles===
: [[Inhale|Inhaling]] [[nanoparticles]] may damage the [[lungs]]. Recent research has suggested [[Carbon Nanotube]]s Nanotubes may be [[harmful]] if [[inhale]]d.
: [[Nanoparticle]]s of certain [[reactivity|reactive]] [[metal]]s [[Chemical Reaction|react]] very quickly with [[Oxygen]] due to their large [[Surface Area]] which could result in an [[explosive|explosion]] if ignited.
*[[Silver]] - [[Nanoparticles]] of [[Silver]] can prevent the growth of [[Micro-organism]]s.
*[[Catalyst]]s - [[Nanoparticles]] of [[Catalyst]]s are far more efficient than larger [[particle]]s due to their very large [[Surface Area|surface area]].
*[[Nanocage]]s Nanocages - A [[nanocage]] made of [[Carbon]] in the form of a [[Fullerene]] or a [[Carbon Nanotube]] can contain a [[drug]] so it can be delivered to the right location in the body.