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Quartz Crystal Microbalance equilibrium

  1. Jul 11, 2014 #1
    Hi guys,

    I am a new user of QCM and I am having trouble reaching equilibrium. I have isolated the chamber from air flows and vibrations, the crystals are clean and all the other removable parts have been cleaned as well.
    The real problem is that sometimes I have managed to reach equilibrium by doing the exact same steps but 4/5 tries the frequency just giggles around in both air and water interfaces.

    I do not know what else to try.

    If any experienced users of QCM have suggestions, they would be very welcome and I would be very thankful.
  2. jcsd
  3. Jul 12, 2014 #2
    I'm assuming you're using it for monitoring deposited film thickness?

    If you tell me which company made your quartz crystal monitor, I'll see what I can scrounge up.
    Last edited: Jul 13, 2014
  4. Jul 13, 2014 #3


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    Science Advisor
    Gold Member

    How are you pumping down the system to achieve a vacuum? Your vibration isolation may be insufficient. Or your station is picking up vibrations from another external source, particularly if you are located in an upper floor of a building.

    If those are not the answer, there may be a problem with the mounting of the crystal.

    There are other possibilities. Is this a new system?
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