Integrated Capacitive- and Resistive-Type Bimodal Relative Humidity Sensor Based on 5,10,15,20-Tetraphenylporphyrinatonickel(II) (TPPNi) and Zinc Oxide (ZnO) Nanocomposite
Rizwan Akram, M. Saleem, Zahid Farooq, Muhammad Yaseen, Ziyad M. Almohaimeed, Qayyum Zafar
Abstract
) and 500 Hz AC test frequency exhibits a significantly higher sensitivity of 387.03 pF/% RH and 95.79 kΩ/% RH in bimodal operation. The average values of both the response and recovery times of the capacitive sensor have been estimated to be ∼30 s. It has also been debated why this high degree of sensitivity and considerable reduction in response/recovery time has been obtained. In addition, the intense and wide bandwidth spectral response of the TPPNi-ZnO nanocomposite indicates that it may also be utilized as a potential light-harvesting heterostructured nanohybrid in future studies.
Topics & Concepts
Relative humidityMaterials scienceCapacitive sensingResistive touchscreenHumidityOptoelectronicsFabricationNanocompositeNanotechnologyElectrical engineeringPathologyEngineeringMedicinePhysicsAlternative medicineThermodynamicsGas Sensing Nanomaterials and SensorsAnalytical Chemistry and SensorsAcoustic Wave Resonator Technologies