TY - JOUR
T1 - Fast Response Facile Fabricated IDE-Based Ultra-sensitive Humidity Sensor for Medical Applications
AU - Ullah, Asad
AU - Zulfiqar, Muhammad Hamza
AU - Khan, Muhammad Atif
AU - Zubair, Muhammad
AU - Mehmood, Muhammad Qasim
AU - Massoud, Yehia
N1 - Funding Information:
The authors would like to acknowledge research funding for the Innovative Technologies Laboratories (ITL) from the King Abdullah University of Science and Technology (KAUST).
Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society
PY - 2023/5/16
Y1 - 2023/5/16
N2 - An eco-friendly, biodegradable, flexible, and facile fabricated interdigital electrode-based capacitive humidity sensor with applications in health and medicine has been reported here. Several sensors use copper tape as electrodes on the polyethylene terephthalate (PET) substrate, with non-woven paper as the sensing layer. Two different configurations of sensors were tested, i.e., with and without pores in the PET substrate. The sensing performance of both sensors has been tested for relative humidity ranging from 35 to 100% at temperatures ranging from 20 to 50 °C. The capacitance of the sensor varies linearly in response to the change in humidity. The sensor with pores shows a response from 28 to 630 pF as the humidity varied from 35 to 100%, whereas the sensor without pores responded from 22 to 430 pF. The response and recovery times of the fabricated sensor are observed as ∼2.4, and ∼1.8 s, respectively, and the sensitivity is 9.67 pF/% RH. The sensors are tested multiple times, and repeatable results are achieved each time with an accuracy of ±0.22%. Further, the sensor’s response is also stable for different ranges of temperatures. Finally, to demonstrate an application of the proposed sensor, it has been utilized to monitor respiration through nose and mouth breathing. The low-cost, stable, repeatable, and highly sensitive response makes our fabricated sensor a promising candidate for practical field applications.
AB - An eco-friendly, biodegradable, flexible, and facile fabricated interdigital electrode-based capacitive humidity sensor with applications in health and medicine has been reported here. Several sensors use copper tape as electrodes on the polyethylene terephthalate (PET) substrate, with non-woven paper as the sensing layer. Two different configurations of sensors were tested, i.e., with and without pores in the PET substrate. The sensing performance of both sensors has been tested for relative humidity ranging from 35 to 100% at temperatures ranging from 20 to 50 °C. The capacitance of the sensor varies linearly in response to the change in humidity. The sensor with pores shows a response from 28 to 630 pF as the humidity varied from 35 to 100%, whereas the sensor without pores responded from 22 to 430 pF. The response and recovery times of the fabricated sensor are observed as ∼2.4, and ∼1.8 s, respectively, and the sensitivity is 9.67 pF/% RH. The sensors are tested multiple times, and repeatable results are achieved each time with an accuracy of ±0.22%. Further, the sensor’s response is also stable for different ranges of temperatures. Finally, to demonstrate an application of the proposed sensor, it has been utilized to monitor respiration through nose and mouth breathing. The low-cost, stable, repeatable, and highly sensitive response makes our fabricated sensor a promising candidate for practical field applications.
UR - http://www.scopus.com/inward/record.url?scp=85159604151&partnerID=8YFLogxK
U2 - 10.1021/acsomega.3c00448
DO - 10.1021/acsomega.3c00448
M3 - Article
C2 - 37214719
AN - SCOPUS:85159604151
SN - 2470-1343
VL - 8
SP - 16842
EP - 16850
JO - ACS OMEGA
JF - ACS OMEGA
IS - 19
ER -