Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Nano particles

  1. Oct 19, 2013 #1
    I know what is lattice constant but it has been given that nano particles have reduced lattice constant due to huge fraction of atoms being in surface. How come the lattice constant of nano particles reduced due to high number of atoms present in surface?

    Why do the surface area, hardness, strength, corrosion resistance, wear resistance, electrical resistance all these properties increase in cases nano particles? There maybe some exception but this is the general trend is there any reason behind it?
  2. jcsd
  3. Oct 19, 2013 #2


    User Avatar
    Science Advisor
    Gold Member

    Surface forces result in changes to the structure of a crystal due to un-paired bonds at the surface.

    As particles grow smaller the surface area to volume ratio increases ... and so you end up with different properties due to the surface forces.
  4. Oct 19, 2013 #3
    Why does the surface area increase as the nano particle grows smaller in size.
  5. Oct 19, 2013 #4


    User Avatar
    Science Advisor
    Gold Member

    Ratio of surface atoms to total atoms. In the limit they are all on the surface as with a buckyball.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Nano particles
  1. The Future is Nano (Replies: 25)

  2. Nano Technology (Replies: 4)

  3. Nano science (Replies: 1)