Sensing Characteristic Of One-dimensional ZnO Nanostructures

In this paper, one dimensional ZnO nanostructure was studied as sensor material by quartz crystal microbalance(QCM). The results of these studies were listed below:1. Preparation and characterization of one-dimensional ZnO nanostructure and doped ZnO nanostructure was studied in this paper. The ZnO nanotetrapods were synthesized by evaporating highly pure zinc pellets (99.999%) at 900℃ in air and then distributed onto the electrode surfaces of the quartz crystal at room temperature. The synthesized ZnO nanotetrapods were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The ZnO nanotetrapods were synthesized by evaporating highly pure zinc pellets (99.999%) at 900℃ in air and PdCl₂ was doped on by traditional solution mixing process. Then the mixed solution distributed onto the electrode surfaces of the quartz crystal at room temperature. Pd²⁺ doped ZnO nanotetrapods were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM)2. ZnO nanotetrapods were prepared and studied for the humidity detection application. The humidity sensors developed were featured by combination of a quartz crystal as a transducer and ZnO nanotetrapods as a sensing element. The experimental results indicated that the response of the sensors varied with the thickness of the ZnO nanotetrapods layer. The maximum frequency sensitivity was nearly ¹00Hz/%RH (relative humidity) in the humidity range of 40% to 80%RH (relative humidity). The ZnO nanotetrapods sensors also had a good frequency stability and reproducibility. Thus it was found that ZnO nanotetrapods were a potential humidity sensing material.3. Pd²⁺ doped ZnO nanotetrapods were prepared and studied for the humidity detection application. The humidity sensors developed were featured by combination of a quartz crystal as a transducer and Pd²⁺ doped ZnO nanotetrapods as a sensing element. The experimental results indicated that the response of the sensors varied with the different dosage PdCl₂. Linear regression algorithm was...