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Vol. 193, Issue 10, October 2015, pp. 93-99




Alternative Processes for Manufacturing of Metal Oxide-based Potentiometric Chemosensors

1 Winfried VONAU, 1 Manfred DECKER, 1 Jens ZOSEL, 1 Kristina AHLBORN, 1 Frank GERLACH, 2 David HALDAN and 2 Steffen WEISSMANTEL

1 Kurt-Schwabe-Institut für Mess- und Sensortechnik, Kurt-Schwabe-Straße 4, 04736 Waldheim, Germany
2 Hochschule Mittweida, Fakultät Ingenieurwissenschaften, Technikumplatz 17, 09648 Mittweida, Germany
1 Tel.: +49 34327 608 0, fax: +49 34327 608131

1 E-mail: info@ksi-meinsberg.de


Received: 31 August 2015 /Accepted: 5 October 2015 /Published: 30 October 2015

Digital Sensors and Sensor Sysstems


Abstract: New possibilities for the preparation of partially selective redox electrodes based on passivated metals of the subgroups IV to VI of the periodic system are presented by the example of vanadium. The gas phase oxidation at controlled oxygen partial pressures (CPO) and the pulsed laser deposition (PLD) as an high-vacuum method are utilised as alternative methods beside the well- established chemical and electrochemical passivation which usually lead to the highest possible oxidation state of the passivated metal. These newly available methods enable in principle the tailoring of oxidation states in the sensitive layer and therefore the optimisation of the electrochemical sensitivity and selectivity of sensors equipped with it. The use of vanadium as basic electrode material is crucial because it shows in several matrices a remarkable corrosion susceptibility. This problem can be solved by the introduction of stable alloys with high vanadium contents. These materials can be efficiently produced by pulsed laser deposition (PLD).


Keywords: Partial selective redox electrode, Chemical passivation, Electrochemical passivation, Gas phase oxidation, Pulsed laser deposition.


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