Comparison of the absolute mass sensitivity of ring electrode QCM and standard QCM using electrodeposition

In this work, we experimentally measured the absolute mass sensitivity of quartz crystal microbalance (QCM) resonators with one ring electrode on the sensing side and compared it to standard QCM resonators with disc electrodes on both sides using electrodeposition. This method allows to compare the absolute mass sensitivity of a ring electrode QCM and standard QCM resonators. The results showed that the average absolute mass sensitivity of a QCM resonator with a ring electrode on one side and a disc electrode on the other side is larger than the one of standard resonators with disc electrodes on both sides. If the ring electrode is facing the electrolyte, the absolute mass sensitivity is 10.28% higher, and for the disc electrode side it is still 5.33% higher. This shows that the ring electrode geometry improves the absolute mass sensitivity in comparison to a standard electrode structure, and therefore reveals a path to improve QCM detection sensitivity in electrochemical research.