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

SPM mechanics

  1. Feb 16, 2009 #1
    How on earth do 'they' get a probe that close to a sample in SPM without it touching (in STM) or at just the right controlled amount?
  2. jcsd
  3. Feb 16, 2009 #2


    User Avatar
    Science Advisor
    Gold Member

    You use very good feedback electronics (a PLL).
    This is combination with piezoelectric stacks that allow for very precise position control is the whole "secret", it is actually remarkably simple.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook