%0 Conference Paper
%A Liew, Q.J.
%A Hawari, H.F.
%A Wah, L.H.
%A Khir, M.H.M.
%A Sulaiman, S.
%D 2021
%F scholars:15477
%I Institute of Electrical and Electronics Engineers Inc.
%K Capacitive sensors; Drops; Electrodes; Graphene; Humidity sensors; Ink; Nanoparticles; Plastic bottles, Comparatives studies; Drop-cast; Flexible; Ink jet; Ink-jet printing; Ink-jet printing method; Inter-digitated electrodes; Interdigitated electrodes; Performance; Sensing material, Ink jet printing
%R 10.1109/ICIAS49414.2021.9642625
%T A Comparative Study on Performance of Drop Casted and Inkjet Printed Humidity Sensor
%U https://khub.utp.edu.my/scholars/15477/
%X In this study, flexible inkjet-printed capacitive humidity sensors were developed using Fujifilm Dimatix 2850 printer. The interdigitated electrodes (IDE) of the sensors were printed with the commercial silver nano-particles ink (AgNPs ink) on the polyethylene terephthalate (PET). To develop the sensing material on the humidity sensors, two methodologies were investigated. The former was a drop-cast method while the latter was an inkjet-printing method. Both utilized graphene oxide (GO) as the sensing material mixed with polyacrylic acid (PAA). The results in capacitance were obtained from experiments conducted in the humidity range from 30  RH to 80  RH. It was found that the former to be more suitable working in humidity range of 30  RH up to 70 RH while the latter more suitable working in humidity range of 30  RH up to 60 RH. The methodology using the drop-casted method presented higher sensitivity 9.766 pF/ RH compared to the inkjet printing method which was 0.441 pF/ RH. The sensors also exhibited good stabilities during short-term and long-term stability tests under predefined humidity and temperature. © 2021 IEEE.
%Z cited By 0; Conference of 8th International Conference on Intelligent and Advanced Systems, ICIAS 2021 ; Conference Date: 13 July 2021 Through 15 July 2021; Conference Code:175661