I'm a postgraduate student, recently we purchased one of this OpenQCM. We are using it to measure the absorption capability of some ionic liquids.
Our concern is about the operation range of the apparatus. For example, we tried to use a small drop of the ionic liquid (approximately 2mg) on top of the gold plate, but the plot for the frequency goes to 0 when using 6MHz, or 16MHz when using 10MHz as quartz frequency. When using an even lighter amount of IL, we can achieve some data, but it's still far of we expected. Is there a limit weight we can use on top of the gold plate?
Until now, we're using a gas flowrate of 10 cc/min. Is it too much? According to your test, you used 0.1 cc/min and I wonder if this could be the reason why it's not properly working.
Thank you so much for your help!