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Subject: search.filters.subject.Humidity sensor

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    Humidity sensor based on graphene oxide film prepared by simple drop-casting process
    (2017-01-01)
    Songkeaw, Potiyan
    ;
    Onlaor, Korakot
    ;
    Tunhoo, Benchapol
    In this work, the film of graphene oxide was deposited by drop-casting process for humidity sensor device. The structural property of graphene oxide film was performed by Raman spectroscopy. The humidity device was fabricated onto the indium tin oxide, as the transparent electrode. The device exhibited the adsorption and desorption behaviors of humidity in a range of 23-93 %RH. The complex impedance measurement was used to explain the mechanisms of the humidity device. The equivalent circuit model of the device was demonstrated.
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    A humidity sensor based on iron oxide films prepared by spin coating process
    (2017-01-01)
    Songkeaw, Potiyan
    ;
    Onlaor, Korakot
    ;
    Tunhoo, Benchapol
    In present work, iron oxide films were prepared by spin coating technique. The effect of annealing temperature on the properties of films was investigated. The structural and surface morphology properties of films have been performed by X-ray diffraction, Fourier transform infrared spectroscopy, and field-emission scanning electron microscope. To fabricate the humidity sensor device, the iron oxide film was spun on indium tin oxide transparent electrode. The sensor exhibited the humidity response in the range of 23-93% RH. The mechanisms and equivalent circuit models of sensor can be explained by complex impedance measurement.