School of Materials, University of Manchester, Oxford Road, M13 9PL, UK.
School of Chemistry, University of Manchester, Oxford Road, M13 9PL, UK.
Nanoscale. 2018 Mar 22;10(12):5599-5606. doi: 10.1039/C7NR08115D.
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 × 104 times for the GO sensor and 5.08 × 103 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.
基于二维（2D）材料的全印刷湿度传感器得到了描述。单层氧化石墨烯（GO）和少层黑磷（BP）薄片分散在适用于喷墨打印的低沸点溶剂中。通过在印刷的银纳米颗粒电极上打印 GO 和 BP 传感层来制备湿度传感器。GO 和 BP 传感器对湿度水平的电响应范围从 11%到 97%相对湿度，在 10 Hz 工作频率下，GO 传感器的电容灵敏度高达 4.45×104 倍，BP 传感器的电容灵敏度高达 5.08×103 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。这些传感器还对近端人类指尖表现出敏感且快速的响应，有望应用于非接触式开关。
