期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 244, 期 -, 页码 259-264出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.01.010
关键词
Humidity detection; Black phosphorus; Quartz crystal microbalance; Two-dimensional sensing material
资金
- National Natural Science Foundation of China [61401047]
- China Postdoctoral Science Foundation [2016M590876]
- Annual Young Academic Leaders Scientific Research Foundation of CUIT [J201506]
- Chengdu University of Information Technology [CRF201501]
This work describes the fabrication of humidity sensors by depositing black phosphorous (BP) nanosheets (prepared by liquid exfoliation of bulk BP) onto a quartz crystal microbalance (QCM) in the form of a thin film. The surface morphology of the prepared BP nanosheets is characterized using a field-emission scanning electron microscope and transmission electron microscopy. The humidity sensing characteristics of the BP-based QCM sensors (such as frequency response, stability, humidity hysteresis, and repeatability) are investigated by using an oscillating circuit method. Experimental results indicate that the BP-based QCM sensors exhibit a well-defined logarithmic frequency response to humidity, and the sensitivity of the sensor is strongly related to the amount of BP nanosheets used in the deposition process. Additionally, the BP-based QCM sensors exhibit high stability over the wide relative humidity range of 11.3%-84.3% RH. The BP-based QCM sensors also exhibit little humidity hysteresis and fast dynamic response and recovery times. This work demonstrates that BP is a promising candidate material for humidity detection when combined with a QCM transducer. (C) 2017 Elsevier B.V. All rights reserved.
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