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Aerosol-Printed MoS2 Ink as a High Sensitivity Humidity Sensor
ACS Omega ( IF 3.7 ) Pub Date : 2022-03-10 , DOI: 10.1021/acsomega.1c06525 Neuma M Pereira 1, 2, 3 , Natália P Rezende 1, 3 , Thiago H R Cunha 1, 3 , Ana P M Barboza 4 , Glaura G Silva 2, 3 , Daniel Lippross 2 , Bernardo R A Neves 1 , Hélio Chacham 1 , Andre S Ferlauto 3, 5 , Rodrigo G Lacerda 1, 3
ACS Omega ( IF 3.7 ) Pub Date : 2022-03-10 , DOI: 10.1021/acsomega.1c06525 Neuma M Pereira 1, 2, 3 , Natália P Rezende 1, 3 , Thiago H R Cunha 1, 3 , Ana P M Barboza 4 , Glaura G Silva 2, 3 , Daniel Lippross 2 , Bernardo R A Neves 1 , Hélio Chacham 1 , Andre S Ferlauto 3, 5 , Rodrigo G Lacerda 1, 3
Affiliation
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Molybdenum disulfide (MoS2) is attractive for use in next-generation nanoelectronic devices and exhibits great potential for humidity sensing applications. Herein, MoS2 ink was successfully prepared via a simple exfoliation method by sonication. The structural and surface morphology of a deposited ink film was analyzed by scanning electron microscopy (SEM), Raman spectroscopy, and atomic force microscopy (AFM). The aerosol-printed MoS2 ink sensor has high sensitivity, with a conductivity increase by 6 orders of magnitude upon relative humidity increase from 10 to 95% at room temperature. The sensor also has fast response/recovery times and excellent repeatability. Possible mechanisms for the water-induced conductivity increase are discussed. An analytical model that encompasses two ionic conduction regimes, with a percolation transition to an insulating state below a low humidity threshold, describes the sensor response successfully. In conclusion, our work provides a low-cost and straightforward strategy for fabricating a high-performance humidity sensor and fundamental insights into the sensing mechanism.
中文翻译：
气溶胶印刷 MoS2 墨水作为高灵敏度湿度传感器
二硫化钼（MoS 2 ）在下一代纳米电子器件中具有吸引力，并且在湿度传感应用中表现出巨大的潜力。在此，通过简单的超声剥离方法成功制备了MoS 2墨水。通过扫描电子显微镜 (SEM)、拉曼光谱和原子力显微镜 (AFM) 分析沉积油墨膜的结构和表面形态。气溶胶印刷的MoS 2墨水传感器具有高灵敏度，室温下相对湿度从10%增加到95%时电导率增加6个数量级。该传感器还具有快速响应/恢复时间和出色的重复性。讨论了水引起电导率增加的可能机制。包含两种离子传导状态的分析模型（在低湿度阈值以下渗流过渡到绝缘状态）成功地描述了传感器响应。总之，我们的工作为制造高性能湿度传感器提供了一种低成本且简单的策略，并提供了对传感机制的基本见解。
更新日期：2022-03-10
中文翻译：
气溶胶印刷 MoS2 墨水作为高灵敏度湿度传感器
二硫化钼（MoS 2 ）在下一代纳米电子器件中具有吸引力，并且在湿度传感应用中表现出巨大的潜力。在此，通过简单的超声剥离方法成功制备了MoS 2墨水。通过扫描电子显微镜 (SEM)、拉曼光谱和原子力显微镜 (AFM) 分析沉积油墨膜的结构和表面形态。气溶胶印刷的MoS 2墨水传感器具有高灵敏度，室温下相对湿度从10%增加到95%时电导率增加6个数量级。该传感器还具有快速响应/恢复时间和出色的重复性。讨论了水引起电导率增加的可能机制。包含两种离子传导状态的分析模型（在低湿度阈值以下渗流过渡到绝缘状态）成功地描述了传感器响应。总之，我们的工作为制造高性能湿度传感器提供了一种低成本且简单的策略，并提供了对传感机制的基本见解。
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