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

Why Gold?

  1. Oct 14, 2011 #1
    Hi, guys!
    Gold is usually used as reference element to calibrate the detector in XPS due to the charge effect, why is Gold so specific? So what element can be the reference element for XRF and LIBS?
    Thanks a lot!
     
  2. jcsd
  3. Oct 14, 2011 #2

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    It is relatively inert, has a non-reactive surface, doesn't form an oxide (at least, not as easily as other metals), and thus, one can use it to calibrate the Fermi level.

    Zz.
     
  4. Oct 14, 2011 #3
    Isn't it because of the the charge effect? Is Gold inert to charge effect as well? The loss of electrons in Gold does not effect its Fermi level? Will Pt also fulfil the calibration task?
     
  5. Oct 14, 2011 #4

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2016 Award

    You will have charging effect if your sample isn't well-grounded, and this will happen to gold as well!

    If you have good ground contacts, then ANY metal will work. So here, you have to ask, why gold. Why not, say, copper, which is considerably LESS expensive?

    Zz.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook