A MoS2 Nanoflakes-Based LC Wireless Passive Humidity Sensor
A MoS2 Nanoflakes-Based LC Wireless Passive Humidity Sensor
复制标题
基于 MoS2 纳米片的 LC 无线无源湿度传感器
DOI：
10.3390/s18124466
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发表时间：
2018-12-01
期刊：
影响因子：
3.9
通讯作者：
Xiong, Jijun
中科院分区：
文献类型：
--
作者：
Su, Shujing;Lv, Wen;Xiong, Jijun
提出了一种基于二硫化钼纳米片的LC无线无源湿度传感器。通过HFSS仿真优化了LC无线无源湿度传感器，并通过丝网印刷技术制作。采用激光扫描共聚焦显微镜、扫描电镜和X射线衍射等手段对MoS 2纳米片进行了表征。测试结果表明，该传感器在10- 95%RH范围内，可长时间稳定工作，滞后为4%RH。在低湿环境（10- 60%RH）下，该湿敏元件的灵敏度为2.79kHz/% RH，在高湿环境（60- 95%RH）下，灵敏度为76.04kHz/% RH。在此基础上，从质子转移理论的角度对传感机理进行了探讨。测试结果还表明，该传感器的响应时间和恢复时间分别为10 s和15 s，在15~40 °C范围内，传感器的灵敏度在10~80% RH范围内不受温度的影响。此外，该传感器在90%RH下对15-25 °C范围内的温度表现出较低的灵敏度。所有这些实验结果表明，所制备的LC无线无源湿度传感器可以在密封狭窄的环境中长时间稳定地监测快速变化的湿度。
In this study, an LC wireless passive humidity sensor based on MoS2 nanoflakes was proposed. The LC wireless passive humidity sensor was optimized by performing HFSS simulations and fabricated via a screen-printing technique. The MoS2 nanoflakes were characterized by laser scanning confocal microcopy, scanning electron microscope, and X-ray diffraction. The measurements show the sensor can operate stably for a long time with a hysteresis of 4% RH (relative humidity) in 10–95% RH. At low humidity environment (10–60% RH), the sensitivity of the as-prepared humidity sensor is 2.79 kHz/% RH, and a sensitivity of 76.04 kHz/% RH was realized in a high humidity environment (60–95% RH). In this regard, the sensing mechanism was discussed in the scope of proton transfer theory. The test results also indicate that the response time and recovery time of the prepared sensor are 10 s, 15 s, respectively and between 15~40 °C the sensitivity of sensor was not temperature-dependent in the range of 10~80% RH. In addition, the sensor shows less sensitivity to temperature in the 15–25 °C range at 90% RH. All of these experimental results show that the prepared LC wireless passive humidity sensor can stably monitor the rapidly changing humidity in a sealed and narrow environment for a long time.