Flexible and highly sensitive humidity sensors using screen-printed TiO2 nanoparticles as sensitive layer

In this work, we present an original example of flexible and miniaturized humidity sensor using screen-printed TiO2 nanoparticles as sensitive layer. The proposed sensors operate under room-temperature conditions and exhibit high sensitivity to changes in relative humidity. The humidity sensor consi...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-12, Vol.939 (1), p.12008
Main Authors: Dubourg, G, Katona, J, Rodović, M, Savić, S, Kitic, G, Niarchos, G, Jancović, N, Crnojević-Bengin, V
Format: Article
Language:English
Subjects:
Current voltage characteristics
Humidity
Laser ablation
Low temperature
Nanomaterials
Nanoparticles
Physics
Relative humidity
Room temperature
Screen printing
Sensitivity
Sensors
Substrates
Titanium dioxide
Water vapor
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Summary:In this work, we present an original example of flexible and miniaturized humidity sensor using screen-printed TiO2 nanoparticles as sensitive layer. The proposed sensors operate under room-temperature conditions and exhibit high sensitivity to changes in relative humidity. The humidity sensor consists of a TiO2-based sensitive nanomaterial printed on the top of interdigitated electrodes (IDEs) patterned by laser ablation on flexible substrate. A TiO2 screen-printing paste from commercially-available nanopowders was developed in order to allow large-scale fabrication of humidity sensors at low temperature. The I-V characteristic of the sensor shows good linearity and resistance measurements confirm the water vapour's absorption on the sensitive layer, showing high sensitivity in the range of 24 to 90% relative humidity, while exhibiting relatively fast response and recovery times, without the need of any refreshing method.
ISSN:1742-6588
1742-6596
1742-6596
DOI:10.1088/1742-6596/939/1/012008