An electrochemical biofilm sensor includes a first electrode that is a working electrode, on whose surface the biofilm develops; a second electrode that is a reference electrode providing a stable reference potential for the polarization of the working electrode; and a third electrode that is a counter-electrode, which can be connected to the first electrode through an electric circuit, thereby enabling the circulation of current from the first to the third electrode or vice versa, as a function of the alteration induced by the biofilm on the kinetics of the reactions evolving on the surface of the first electrode. The first, second, and/or third electrode have a coating based on mixed oxides of different noble metals, such as iridium, ruthenium, platinum, rhodium, tantalum or niobium, with a thickness between 0.1 and 50 microns, preferably 2.5 microns±10%, one or more of the electrodes being made of titanium or tantalum.
The invention relates to an electrochemical biofilm sensor comprising a first, a second and a third electrode, wherein the first electrode is a working electrode on whose surface the biofilm whose growth is to be measured develops, the second electrode is a reference electrode having the function of providing a stable reference potential for the polarization of the working electrode, the third electrode is a counter-electrode that can be connected to the first electrode through an electric circuit so as to allow the circulation of current from the first electrode to the third electrode or vice versa, a function of the alteration induced by the biofilm on the kinetics of the evolving reactions on the surface of the first electrode. The first electrode and/or the second electrode and/or the third electrode have the characteristic of being coated with a coating based on mixed oxides of different noble metals, such as iridium, ruthenium, platinum, rhodium, tantalum or niobium, and wherein one or more electrodes are made of titanium or tantalum, and wherein the coating has a thickness of between 0. 1 and 50 microns, preferably 2.5 microns ± 10%.
G01N 27/22 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la capacité
H01G 9/048 - Électrodes caractérisées par leur structure
H01G 9/28 - Combinaisons structurales de condensateurs électrolytiques, de redresseurs électrolytiques, de détecteurs électrolytiques, de dispositifs de commutation électrolytiques, avec d'autres composants électriques non couverts par la présente sous-classe
H01G 11/02 - Condensateurs hybrides, c.-à-d. ayant des électrodes positive et négative différentesCondensateurs électriques à double couche [EDL]Procédés de fabrication desdits condensateurs ou de leurs composants utilisant des combinaisons de réactions de réduction et d'oxydation, p. ex. dispositifs redox ou solion
H01G 11/08 - Combinaisons structurelles, p. ex. assemblage ou connexion de condensateurs hybrides ou EDL avec d’autres composants électriques, au moins un condensateur hybride ou EDL étant le composant principal
G01R 27/26 - Mesure de l'inductance ou de la capacitanceMesure du facteur de qualité, p. ex. en utilisant la méthode par résonanceMesure de facteur de pertesMesure des constantes diélectriques
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