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Humidity sensing properties of Pd2+-doped ZnO nanotetrapods

机译：掺杂Pd2 +的ZnO纳米四脚架的湿度感测特性

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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 microbalance (QCM) as a transducer and Pd2+-doped ZnO nanotetrapods as a sensing element. The ZnO nanotetrapods were synthesized by evaporating highly pure zinc pellets (99.999%) at 900 degrees C 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). The experimental results indicated that the response of the sensors varied with the different dosage PdCl2. Linear regression algorithm was used for evincing the highly linear behavior of the Pd2+-doped ZnO nanotetrapods sensor. In this humidity sensing system, the Pd2+-doped ZnO nanotetrapods sensing material coated on the gold electrode of QCM showed good sensitivity (similar to 74.24324 Hz/%RH (relative humidity)), reproducibility, linearity (R-2 = -0.98834), short response and recovery time (less than 5 s). (c) 2006 Elsevier B.V All rights reserved.
机译：制备了掺Pd2 +的ZnO纳米四脚架，并研究了其在湿度检测中的应用。所开发的湿度传感器的特征在于，石英微天平（QCM）作为传感器，掺Pd2 +的ZnO纳米四脚架作为传感元件。通过在900摄氏度的空气中蒸发高纯度的锌颗粒（99.999％）来合成ZnO纳米四脚架，并通过传统的溶液混合工艺掺杂PdCl2。然后，混合溶液在室温下分布到石英晶体的电极表面上。通过X射线衍射（XRD）和扫描电子显微镜（SEM）对掺Pd2 +的ZnO纳米四脚架进行了表征。实验结果表明，传感器的响应随PdCl2剂量的不同而变化。线性回归算法用于证明Pd2 +掺杂的ZnO纳米四脚架传感器的高度线性行为。在该湿度传感系统中，涂覆在QCM金电极上的Pd2 +掺杂的ZnO纳米四足体传感材料显示出良好的灵敏度（类似于74.24324 Hz /％RH（相对湿度）），可重复性，线性（R-2 = -0.98834），响应和恢复时间短（少于5 s）。 （c）2006 Elsevier B.V保留所有权利。

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