Screen-printed graphene-carbon ink based disposable humidity sensor with wireless communication

Beniwal, A. , Ganguly, P., Aliyana, A. K., Khandelwal, G. and Dahiya, R. (2023) Screen-printed graphene-carbon ink based disposable humidity sensor with wireless communication. Sensors and Actuators B: Chemical, 374, 132731. (doi: 10.1016/j.snb.2022.132731)

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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 Ω/%RH) in humidity ranging from 25%RH to 91.7%RH. The sensor displays 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 Ω/%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.

Item Type:Articles
Additional Information:This work is supported in part by Engineering and Physical Science Research Council (EPSRC) through Engineering Fellowship (EP/R029644/1) and European Commission through Innovative Training Network AQUASENSE (H2020-MSCA-ITN-2018–813680).
Glasgow Author(s) Enlighten ID:Beniwal, Dr Ajay and Ganguly, Ms Priyanka and Aliyana, Akshaya and Dahiya, Professor Ravinder and Khandelwal, Dr Gaurav
Creator Roles:
Beniwal, A.Conceptualization, Methodology, Investigation, Formal analysis, Validation, Writing – original draft
Ganguly, P.Methodology, Investigation, Formal analysis
Aliyana, A. K.Software, Investigation
Khandelwal, G.Investigation
Dahiya, R.Conceptualization, Writing – review and editing, Formal analysis, Funding acquisition, Supervision
Authors: Beniwal, A., Ganguly, P., Aliyana, A. K., Khandelwal, G., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Sensors and Actuators B: Chemical
ISSN (Online):1873-3077
Published Online:23 September 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Sensors and Actuators B: Chemical 374:132731
Publisher Policy:Reproduced under a Creative Commons license

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
301728Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/R029644/1ENG - Electronics & Nanoscale Engineering