Definitions for "NANOPARTICLES"
Particles with controlled dimensions on the order of nanometres. Examples include colloidal gold, magnetite particles, and luminescent semiconductor aggregates that are also known as 'quantum dots'.
Particles of less that 50 nm diameter
a term that describes tiny particles (roughly a billionth of a meter in size) that have unique properties useful in many products ranging from periscopes to sunscreen.