title: Note: electrode polarization of Galinstan electrodes for liquid impedance spectroscopy.
abstract: Electrode polarization is a significant obstacle in the impedance measurements of ionic liquids. An atomically smooth electrode surface could potentially reduce unwanted impedance contributions from electrode polarization. Liquid metal electrodes were formed by adhering Galinstan to acrylic plates in a parallel-plate capacitor arrangement. Electrode polarization was compared to a similar cell with stainless steel electrodes. The impedance of salt and protein solutions (β-lactoglobulin) was measured from 40 Hz to 110 MHz. Because of oxide layer formation, the performance of the Galinstan electrode is significantly different than the theoretical ideal.
authors.affiliation: Department of Electrical and Computer Engineering, Brigham Young University, 459 Clyde Building, Provo, Utah 84602, USA. brettmellor@byu.edu
authors.forename: Brett L
authors.initials: BL
authors.lastname: Mellor
authors.forename: Nathan A
authors.initials: NA
authors.lastname: Kellis
authors.forename: Brian A
authors.initials: BA
authors.lastname: Mazzeo