Abstract

In this work for the first time, a new bis(4-benzylpiperazine-1-carbodithioato-k²S,Sʹ)nickel(II) complex (hereafter caged nickel sulfide) has been used to fabricate the capacitive-type and resistive-type sensor. The surface consisted of 2D plates, pores and pore-channels of various shapes and size. These 2D plates and pores played a pivotal role in the sensing mechanism of the sensor. The conduction mechanism is based on Von Grotthuss mechanism. In the relative humidity (RH) range 30–90%, the resistance of the sensor was decreased by two orders of magnitude (from 2.94 × 10⁸ Ω at 30%RH to 2.34 × 10⁶ Ω at 90%RH at operational frequency of 120 Hz). While at applied frequency of 120 Hz, capacitance of the sensor was increased from 15.95 pF to 38.1 pF in the range of 30–90%RH. At higher frequency (10 kHz) the capacitance of the sensor is reduced to 6.285 pF. The maximum hysteresis of 1.54% is noted which is less than the reported in the literature. The response and recovery time of the sensor were 25 and 30 s, respectively, which are either far smaller or greater than the response and recovery time of the various sensors reported in the literature.

中文翻译：

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基于新型笼状硫化镍的电阻式和电容式湿度和温度传感器，用于环境监测

摘要

在这项工作中，首次使用了新的双（4-苄基哌嗪-1-碳二硫代-k ² S， Sʹ ）镍（II）配合物（以下称为笼状硫化镍）来制造电容式和电阻式。类型传感器。表面由二维板，孔和各种形状和大小的孔道组成。这些二维板和孔在传感器的传感机制中起着关键作用。传导机制基于冯格罗特斯机制。在相对湿度（RH）范围30-90％，所述传感器的电阻降低由幅度（两个数量从2.94×10 ⁸ Ω，在30％RH至2.34×10 ⁶工作频率为120 Hz时，在90％RH时为Ω）。在施加120 Hz的频率时，在30–90％RH的范围内，传感器的电容从15.95 pF增加到38.1 pF。在较高的频率（10 kHz）下，传感器的电容减小至6.285 pF。注意到最大滞后为1.54％，小于文献中报道的滞后。传感器的响应和恢复时间分别为25和30 s，远小于或大于文献中报道的各种传感器的响应和恢复时间。