A practical method for calculating the mass sensitivity of quartz crystal microbalance (QCM) resonators with ring-shaped Au electrodes on one side based on electrodeposition is presented in this communication. While for standard QCMs, an average mass sensitivity can be calculated despite its approximately Gaussian distribution, the mass sensitivity of QCMs with an asymmetrical electrode structure is difficult to calculate. However, non-standard electrode geometries might be beneficial for sensor applications especially in the area of electrochemistry. By measuring the resonance frequency change of a quartz crystal during deposition and applying Faraday’s law, we determined the mass sensitivity of QCM resonators with a ring electrode. We also studied the influence of the gold electrode thicknesses on the mass sensitivity of the ring-shaped and disc shaped electrodes. The experimental results showed that the mass sensitivity of the ring-shaped electrodes was 5%∼20% higher than those of the disc shaped electrodes. This method is practical and convenient for determining the mass sensitivity of the QCM with ring electrode, and it can be extended to measure QCMs with symmetrical and asymmetrical electrode structures. Such resonators with modified electrode structures may be of interest for studying electrochemical processes where a higher mass sensitivity is desirable.

在此交流中，提出了一种实用的方法，该方法可基于电沉积来计算一侧带有环形Au电极的石英晶体微天平（QCM）谐振器的质量灵敏度。尽管对于标准QCM，尽管其近似呈高斯分布，但仍可以计算出平均质量灵敏度，但难以计算具有不对称电极结构的QCM的质量灵敏度。但是，非标准电极几何形状可能对传感器应用特别是电化学领域有益。通过测量沉积过程中石英晶体的谐振频率变化并应用法拉第定律，我们确定了带有环形电极的QCM谐振器的质量灵敏度。我们还研究了金电极厚度对环形和盘形电极质量灵敏度的影响。实验结果表明，环形电极的质量灵敏度比盘形电极的质量灵敏度高5％〜20％。该方法对于测定带环形电极的QCM的质量灵敏度是实用且方便的，并且可以扩展到测量具有对称和不对称电极结构的QCM。具有改进的电极结构的这种谐振器对于研究需要更高质量灵敏度的电化学过程可能是感兴趣的。该方法对于测定带环形电极的QCM的质量灵敏度是实用且方便的，并且可以扩展到测量具有对称和不对称电极结构的QCM。具有改进的电极结构的这种谐振器对于研究需要更高质量灵敏度的电化学过程可能是感兴趣的。该方法对于测定带环形电极的QCM的质量灵敏度是实用且方便的，并且可以扩展到测量具有对称和不对称电极结构的QCM。具有改进的电极结构的这种谐振器对于研究需要更高质量灵敏度的电化学过程可能是感兴趣的。