New Solvent System For The Improved Electrochemical Performance Of Screen-printed Polyurethane Membrane-based Solid-state Sensors

In previous work to mass produce chemical sensors using screen printing, we showed the need for higher boiling solvents (i.e. lower evaporation rates) to increase the membrane paste viscosity and thixotrophy. While this approach achieved a paste with good mechanical properties for screen printing, t...

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Bibliographic Details
Main Authors: Hower, R.W., Shin, J.H., Cha, G.S., Meruva, R.K., Meyerhoff, M.E., Brown, R.B.
Format: Conference Proceeding
Language:English
Subjects:
Biomembranes
Chemical sensors
Chemistry
Electrodes
Printing
Sensor arrays
Sensor phenomena and characterization
Solid state circuits
Solvents
Viscosity
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Summary:In previous work to mass produce chemical sensors using screen printing, we showed the need for higher boiling solvents (i.e. lower evaporation rates) to increase the membrane paste viscosity and thixotrophy. While this approach achieved a paste with good mechanical properties for screen printing, the resulting sensors for some ions exhibited poor electrochemical performance in terms of detection limits and slopes. This paper reports a new technique using Dimethyl phthalate, a low boiling placticizer, for membrane formulation that facilitates screen printing achieving appropriate paste viscosity, while maintaining good electrochemical characteristics.
DOI:10.1109/SENSOR.1995.717368