title: Non-polarisable dry electrode based on NASICON ceramic.
abstract: A NASICON-type ceramic (high sodium ion conductor) is proposed to record bioelectric signals. The electrode does not need gel before its application. The principle of the measurements is based on a sodium ion exchange between the skin and the material. Electrical measurements performed in saline solutions show that the electrode is slightly polarisable. The skin-electrode impedance was investigated. The impedance decreases as a function of the time of application. The resistive component is the major source of the impedance change. This can be explained by the perspiration process which occurs immediately with time after the application of the NASICON-based electrode on the skin. The skin condition is also an important parameter. NaCl saline solution or abrasion causes the resistance to decrease markedly.
authors.affiliation: Laboratorie d'lonique et d'Electrochimie du Solide de Grenoble, Ecole Nationale Supérieure d'Electrochimie et d'Electrométallurgie de Grenoble, Saint Martin d'Hères, France.
authors.forename: C
authors.initials: C
authors.lastname: Gondran
authors.forename: E
authors.initials: E
authors.lastname: Siebert
authors.forename: P
authors.initials: P
authors.lastname: Fabry
authors.forename: E
authors.initials: E
authors.lastname: Novakov
authors.forename: P Y
authors.initials: PY
authors.lastname: Gumery
mesh_terms: D002516:Ceramics; D017097:Electric Impedance; D004566:Electrodes; D006801:Humans; D017136:Ion Transport; D012879:Skin Physiological Phenomena; D012964:Sodium / Q000502:physiology; D013546:Sweating
chemical_list: D012964:Sodium