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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

    f95toli

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    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.
     
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