Natashah, Fadlan Arif and Sabri, Amirul Ashraf Md and Alzahrani, Hanan and Mamat, Mohamad Hafiz and Roslan, Nur Adilah and Bawazeer, Tahani M. and Alsenany, Nourah and Alsoufi, Mohammad S. and Supangat, Azzuliani (2023) Dicarbocyanine-based organic humidity sensors. Synthetic Metals, 293. ISSN 0379-6779, DOI https://doi.org/10.1016/j.synthmet.2023.117299.
Full text not available from this repository.Abstract
The utilization of organic dicarbocyanine dye-conjugated molecules, specifically 1,1 `-diethyl-4,4 `-dicarbocyanine iodide (DDCI-4), as the sensing film in capacitive-type humidity sensors has been demonstrated. The structural, morphological, and wettability characteristics of the sensing films as well as the performance of the electrode gaps of the devices were analyzed. Aluminum (Al)/DDCI-4/Al capacitive humidity sensors were fabricated using solution-processed spin coating techniques in a planar geometry. In this study, a surface profiler was used to measure the size of electrode gaps, which were 94.87 +/- 1.20 mu m, 391.00 +/- 1.53 mu m, 902.00 +/- 2.08 mu m, and 1906.67 +/- 3.33 mu m. Compared to those with larger gaps (391 mu m, 902 mu m, and 1907 mu m), the device with the smallest gap measured 45 +/- 9.1 fF/%RH with the highest sensitivity. In addition, the hysteresis with response and recovery performances has been studied, revealing the lowest values of 0.31%, 6 s, and 9 s, respectively. It is anticipated that the 1,1 `-diethyl-4,4 `-dicarbocyanine iodide's electronic, ionic, and dipole polarizations are responsible for the excellent performance of dye-based organic humidity sensors.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya under the Faculty Research Grant GPF080A- 2020 |
| Uncontrolled Keywords: | Dye; Conjugated molecules; Humidity sensor; Capacitive; Polarization |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 24 Nov 2023 08:13 |
| Last Modified: | 24 Nov 2023 08:13 |
| URI: | http://eprints.um.edu.my/id/eprint/38648 |
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