Nanoparticles

C2__Structure-Bonding

Particle Types

Coarse ()

Have a diameter between and and they contain many thousands of atoms

Fine ()

Diameter between and contain several thousand atoms

Nanoparticles

Diameter between and and contain only a few hundred atoms. Has a huge surface area : volume ratio which is useful as you need a lot lower volume for the same effect. Used in:

• Medicines
• Sun creams
• Cosmetics
• Deodorants
• Electronics
• Catalysts Risks:
• Can be absorbed by body and enter cells, little is known about effects of this As particle size decreases by ten times the, surface area : volume ratio increases 10x

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