Fully printed high performance humidity sensors based on two-dimensional materials
Fully printed high performance humidity sensors based on two-dimensional materials
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DOI：
10.1039/c7nr08115d
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发表时间：
2018-03-28
期刊：
影响因子：
6.7
通讯作者：
Derby, B.
中科院分区：
文献类型：
--
作者：
He, P.;Brent, J. R.;Derby, B.
描述了基于二维 (2D) 材料的全印刷湿度传感器。将单层氧化石墨烯（GO）和少层黑磷（BP）薄片分散在适合喷墨印刷的低沸点溶剂中。湿度传感器是通过在印刷的银纳米颗粒电极上印刷 GO 和 BP 传感层来制造的。 GO 和 BP 传感器对湿度水平的电响应范围为 11% 至 97% 相对湿度，这表明在 10 Hz 工作频率下，GO 传感器的电容灵敏度为 4.45 x 10(4) 倍，BP 传感器为 5.08 x 10(3) 倍。 GO 和 BP 传感器的响应/恢复时间分别为 2.7/4.6 s 和 4.7/3.0 s。这些传感器还对人类近端指尖表现出灵敏和快速的响应，显示出在非接触式开关中的潜在应用。
Fully printed humidity sensors based on two-dimensional (2D) materials are described. Monolayer graphene oxide (GO) and few-layered black phosphorus (BP) flakes were dispersed in low boiling point solvents suitable for inkjet printing. The humidity sensors were fabricated by printing GO and BP sensing layers on printed silver nanoparticle electrodes. The electrical response of the GO and BP sensors to humidity levels ranges from 11 to 97% relative humidity, which revealed a high capacitance sensitivity of 4.45 x 10(4) times for the GO sensor and 5.08 x 10(3) times for the BP sensor at 10 Hz operation frequency. Response/recovery times of the GO and BP sensor were found to be 2.7/4.6 s and 4.7/3.0 s respectively. These sensors also showed sensitive and fast response to a proximal human fingertip, showing potential applications in contactless switching.