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AuthorMallick, Shoaib
AuthorAhmad, Zubair
AuthorTouati, Farid
AuthorShakoor, R.A.
Available date2020-05-14T09:55:46Z
Publication Date2019
Publication NameSensors and Actuators, B: Chemical
AbstractIn this work, we enhanced the humidity sensing properties of the polyvinylidene fluoride titanium dioxide (PVDF-TiO2) nanocomposites based capacitive humidity sensors by modifying the film surface. The surface morphology of the PVDF-TiO2 nanocomposite films was modified using the acetone etching. The structural, morphological, thermal and hydrophilic properties of the nanocomposite films were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), differential scanning calorimetry (DSC) and contact angle measurements. To prepare the nanocomposite films, 2.5 wt% solution of PVDF and 0.5 wt% solution of TiO2 was mixed in the volumetric ratio (1:2). To fabricate the humidity sensors, the PVDF-TiO2 nanocomposite films were deposited on interdigitated ITO electrodes by spin coating technique. The humidity sensing properties of the sensors were investigated in the relative humidity (RH) range of 30–80%. The sensor shows a linear and stable response over the whole investigated range. The response and recovery times of the composite based sensors are to be 45 s and 11 s, respectively. The average value obtained for the hystersis is 1.05%.
SponsorThis study was made possible by GSRA3-1-1116-14016 from the Qatar National Research Fund (a member of Qatar Foundation) . The findings made herein are solely the responsibility of the authors. The authors are also very grateful to the Centre for Advanced Materials (CAM), Qatar University for the inclusive support. Appendix A
PublisherElsevier B.V.
SubjectHumidity sensor
SubjectPolyvinylidene fluoride
SubjectPVDF-TiO2 nanocomposite
TitleImprovement of humidity sensing properties of PVDF-TiO2 nanocomposite films using acetone etching
Volume Number288

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