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Another part of our experimental setup requires me to lower the surface energy of a small sealed hollow glass sphere (30mm dia) in order to minimize adsorption. Any idea how I can do this? There seem to be some PTFE sprays, but how well do they adhere to (fragile) glass? Any alternatives ideas?

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  • $\begingroup$ More details on the experiment? It seems to me that you have the experiment wrong. I suspect you're trying to change the surface tension. $\endgroup$ – MaxW Oct 31 '15 at 0:55
  • $\begingroup$ Measuring density changes in gas using the buoyancy of a glass sphere and a microbalance. Unless the glass is heated between measurements adsorption can skew the results if density change is low. $\endgroup$ – Dirk Bruere Oct 31 '15 at 12:32

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