Synthesis and Fabrication of Graphite/WO3 Nanocomposite-Based Screen-Printed Flexible Humidity Sensor

The resistive type of graphite/WO 3 nanocomposite-based humidity sensor is fabricated through screen printing on a flexible polyethylene terephthalate substrate. Three different nanocomposite-based humidity sensors have been fabricated and analyzed for their humidity-sensing characteristics. The str...

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Bibliographic Details
Published in:	Journal of electronic materials Vol. 52; no. 6; pp. 4226 - 4238
Main Authors:	Saquib, Mohammad, Shiraj, Shazneen, Nayak, Ramakrishna, Nirmale, Aditya, Selvakumar, M.
Format:	Journal Article
Language:	English
Published:	New York Springer US 01-06-2023 Springer Nature B.V
Subjects:	Cellulose acetate Characterization and Evaluation of Materials Chemistry and Materials Science Dynamic response Electronics and Microelectronics Fourier transforms Graphene Graphite Higher education Humidity Hysteresis Instrumentation Materials Science Nanocomposites Optical and Electronic Materials Original Research Article Polyethylene terephthalate Relative humidity Room temperature Screen printing Sensitivity Sensors Solid State Physics Substrates Humidity sensor tungsten oxide nanocomposite flexible device graphite screen printing
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Summary:	The resistive type of graphite/WO 3 nanocomposite-based humidity sensor is fabricated through screen printing on a flexible polyethylene terephthalate substrate. Three different nanocomposite-based humidity sensors have been fabricated and analyzed for their humidity-sensing characteristics. The structure elucidation of the nanocomposite was carried out using x-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy. By exposing the printed humidity sensor to relative humidity ranging from 11% to 97% at room temperature, its capabilities were studied. The relative resistance, sensitivity, dynamic response, and hysteresis were determined for all three devices, and they showed maximum responses towards relative humidity changes with the highest sensitivity of ≈ 60.8% and excellent hysteresis curves (maximum change of ≈ 1%). The screen-printed flexible humidity sensor exhibited less than a 5% change in the internal electrical resistance when subjected to various bending angles.
ISSN:	0361-5235 1543-186X
DOI:	10.1007/s11664-023-10404-y