A new method for measuring properties of liquid by using a single quartz crystal microbalance

As an ultra-sensitive mass sensing device, quartz crystal microbalance (QCM) can also be used to detect a variety of analytes in liquid environment. Previous works reported separate density and viscosity measurements of liquid by using dual QCMs. In this work, we present a novel theoretical model and a new method to separate density and viscosity measurements of liquid only using a single QCM, based on the frequency response analysis. Experimental results demonstrate the merit of the single QCM setup in determining the physical properties of liquid is an exciting new solvent.