An Experimental Investigation of Ionic Vibration Potential Sensing in Electrolytes

Passing of an ultrasonic wave through an ionic solution results in distortion in electric balances between anion and cation ions, generating Ionic Vibration Potential (IVP) signals in solution for various electrolytes. In previous work, methods of Colloid Vibration Potential (CVP) imaging for characterization of nano-particle suspensions have been reported. This paper reports the further work on effect of IVP for various 1-1, 1-2 and 1-3 electrolytes, including NaCl, KCl, RbCl, CsCl, MnCl2, CuCl2, FeCl2 and FeCl3. Transition metals were chosen to understand the effect of different valences but also to understand how IVP signals change due to the closeness of atomic weight of these metals. Concentration and electrical conductivity effects were also measured. Group 1 chlorides were used to compare non-invasive imaging results with invasive imaging results from previous work. Two different valences of iron were used to investigate the effect of the number of anions on signal amplitude.