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)

Abstract

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).
• Status: Published
• Refereed: Yes
• 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
• Publisher: Elsevier
• ISSN: 0925-4005
• 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

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
301728		Engineering Fellowships for Growth: Printed Tactile SKIN	Ravinder Dahiya	Engineering and Physical Sciences Research Council (EPSRC)	EP/R029644/1	ENG - Electronics & Nanoscale Engineering