Screen-printed graphene-carbon ink based disposable humidity sensor with wireless communication
Screen-printed graphene-carbon ink based disposable humidity sensor with wireless communication
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DOI：
10.1016/j.snb.2022.132731
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发表时间：
2022-10-07
影响因子：
8.4
通讯作者：
Dahiya, Ravinder
中科院分区：
文献类型：
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作者：
Beniwal, Ajay;Ganguly, Priyanka;Dahiya, Ravinder
湿度传感对于一些工业、环境和医疗保健应用至关重要，其中许多应用需要灵活的传感器外形，并具有一次性和易于制造工艺等特点。在此，我们提出了一种柔性的、具有成本效益的、一次性的湿度传感器，它是在纸基板上开发的。丝网印刷石墨烯-碳（G-C）油墨基湿度传感器在25% ~ 91.7%RH湿度范围内的电阻变化（-12.4 ω /%RH）表现出良好的传感性能。该传感器显示出高灵活性（在弯曲半径为40mm， 30mm， 25mm和20mm时进行研究），可观的稳定性（> 4个月），高重复性（> 100个周期），短响应/恢复时间（呼吸率监测-4秒/-6秒）和良好的再现性（微小变化-+/- 1 ω /%RH）。评价了该传感器在空间湿度监测、呼吸速率监测和土壤湿度监测中的应用效果。最后，通过将数据无线传输到智能手机，还演示了湿度的实时监测，以显示制造的传感器在环境、农业和医疗保健应用中的潜力。
Humidity sensing is crucial for several industrial, environmental, and healthcare applications, many of which require sensors in flexible form factors and with features such as disposability and facile fabrication processes. Herein, we present a flexible, cost-effective, and disposable humidity sensor developed on paper substrate. The screen-printed graphene-carbon (G-C) ink-based humidity sensor demonstrates good sensing performance in terms of change in resistance (-12.4 omega/%RH) in humidity ranging from 25%RH to 91.7%RH. The sensor dis-plays high flexibility (studied at bending radiuses 40 mm, 30 mm, 25 mm, and 20 mm), appreciable stability (> 4 months), high repeatability (> 100 cycles), short response/recovery time (-4 s/-6 s towards respiration rate monitoring) and good reproducibility (minor variations -+/- 1 omega/%RH). The efficacy of fabricated humidity sensor is evaluated for spatial humidity monitoring, respiration rate monitoring, and soil moisture monitoring. Finally, the real time monitoring of humidity is also demonstrated via wireless transmission of data to a smartphone to display the potential of the fabricated sensor for environmental, agricultural, and healthcare applications.