Effect of ion vibration potential for 1-1 electrolytes

•We demonstrate ion vibration potential measurement technique to explore 1-1 electrolytes.•We present a new measurement strategy using an external sensor.•IVP magnitude increases as the electrolyte concentration increases.•IVP magnitude increases as the electrolyte mass increases.•IVP magnitude is displayed and attenuation is addressed as a function of the excitation frequency.

Ultrasound vibration potential techniques have been used for characterising colloidal systems and electrolytes. The generated electric potential, ion vibration potential (IVP), is detected as the acoustic wave is interacting with the ionic source. In this paper we attempt to study IVP measurements of NaCl, KCl, RbCl and CsCl with different concentrations. We demonstrate a new experimental approach with convenient access to the electrolyte and improved S/R ratio. In addition an external sensor is applied to the homogenous source in order to detect the IVP signal magnitude. The investigation reveals that the IVP magnitude is largest for CsCl (2.16 ⋅ 10−3 mA) compared to NaCl (2.9 ⋅ 10−4 mA), consequently the signal amplitude increases from 2.16 ⋅ 10−3 mA to 2.65 ⋅ 10−3 mA as the concentration varies from 1 to 3 mol/L. However IVP magnitude decreases for CsCl from 2.65 ⋅ 10−3 mA to 9.5 ⋅ 10−4 mA as the excitation frequency increases from 0.5 MHz, 1 MHz to 2 MHz.

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