In this paper,we investigated the effect of humidity on paper substrates and propose a simple and low-cost method for their passivation using ZnO nanoparticles. To this end, we built paper-based microdevices based on an interdigitated electrode (IDE) configuration by means of a mask-less laser patterning method on simple commercial printing papers. Initial resistive measurements indicate that a paper substrate with a porous surface can be used as a cost-effective, sensitive and disposable humidity sensor in the 20% to 70% relative humidity (RH) range. Successive spin-coated layers of ZnO nanoparticles then, control the effect of humidity. Using this approach, the sensors become passive to relative humidity changes, paving the way to the development of ZnO-based gas sensors on paper substrates insensitive to humidity.
CITATION STYLE
Niarchos, G., Dubourg, G., Afroudakis, G., Georgopoulos, M., Tsouti, V., Makarona, E., … Tsamis, C. (2017). Humidity sensing properties of paper substrates and their passivation with ZnO nanoparticles for sensor applications. Sensors (Switzerland), 17(3). https://doi.org/10.3390/s17030516
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