• when particle so small, properties of particles change at different surface area to bonding (?) ratio.
  • gold is red on nanoscale ?!!! (wowzers)

nanoparticles

  • the size of nanomaterials compared with diff objects
    • very very small (around 10-100 nanometres)

nano-materials

  • catalysts are nano-materials !!
  • the reactivity of catalysts depends on the surface area.
  • we donโ€™t know long term effect of nano-materials (uh oh)