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Sensors 2017, 17(3), 516;

Humidity Sensing Properties of Paper Substrates and Their Passivation with ZnO Nanoparticles for Sensor Applications

Nano and Microelectronics Group, BioSense Institute, 1 Zorana Djindijca, 21000 Novi Sad, Serbia
Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, Patriarhou Gregoriou & Neapoleos, 15310 Aghia Paraskevi, Greece
Author to whom correspondence should be addressed.
Academic Editors: Christos Riziotis, Evangelos Hristoforou and Dimitrios Vlachos
Received: 5 December 2016 / Revised: 2 February 2017 / Accepted: 4 February 2017 / Published: 4 March 2017
(This article belongs to the Special Issue Materials and Applications for Sensors and Transducers)
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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. View Full-Text
Keywords: humidity passivation; paper substrate; ZnO nanoparticles; disposable sensors humidity passivation; paper substrate; ZnO nanoparticles; disposable sensors

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Niarchos, G.; Dubourg, G.; Afroudakis, G.; Georgopoulos, M.; Tsouti, V.; Makarona, E.; Crnojevic-Bengin, V.; Tsamis, C. Humidity Sensing Properties of Paper Substrates and Their Passivation with ZnO Nanoparticles for Sensor Applications. Sensors 2017, 17, 516.

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