Influence of thermal annealing on a capacitive humidity sensor based on newly synthesized macroporous PBObzT2
| Author | Raza, Ehsan |
| Author | Asif, Muhammad |
| Author | Aziz, Fakhra |
| Author | Azmer, Mohamad Izzat |
| Author | Malika, Haseeb Ashraf |
| Author | The, Chin-Hoong |
| Author | Najeeb, Mansoor Ani |
| Author | Zafar, Qayyum |
| Author | Ahmad, Zubair |
| Author | Wahab, Fazal |
| Author | Daik, Rusli |
| Author | Sarih, Norazilawati Muhamad |
| Author | Supangat, Azzuliani |
| Author | Sulaiman, Khaulah |
| Available date | 2021-04-22T13:00:31Z |
| Publication Date | 2016 |
| Publication Name | Sensors and Actuators, B: Chemical |
| Resource | Scopus |
| Abstract | In this work, we report on the application of a newly synthesized macroporous polythiophene derivative, benzo[b]thiophene end-capped dioctyloxy-benzene(PBObzT2), in the fabrication of a capacitive humidity sensor. The sensor has been fabricated by spin-coating polymer solution in the gap between pre-deposited aluminum electrodes to form a coplanar Al/PBObzT2/Al capacitive humidity sensor. We have also demonstrated how effectively thermal annealing has improved the physical aspects of the active layer and sensing properties of the sensor. The sensor's capacitance is measured against RH variations at different frequencies. Particularly, at an optimum annealing temperature of 75 �C, the sensor exhibits high sensitivity, fast response and low hysteresis. The hydrophobic nature of the polymer makes it highly appropriate to be used in the humidity sensors |
| Sponsor | Authors are thankful to the Ministry of Education, Malaysia , for the financial support under High Impact Research (HIR) grant UM.S/625/3/HIR/MOE/26 with account number UM.0000080/HIR.C3, Fundamental Research Grant Scheme (FRGS) FP046-2015A and University Malaya under University Malaya Research Grant (UMRG) RP007A-13AFR and RP007A/2011A . Fakhra Aziz would like to acknowledge the support of Higher Education Commission (HEC) of Pakistan through Post Doctoral Fellowship. The authors are also grateful to the University Kebangsaan Malaysia (UKM) for providing the research funds through grant FST-06-FRGS0095-2010 . Appendix A |
| Language | en |
| Publisher | Elsevier B.V. |
| Subject | Aluminum coatings Annealing Humidity sensors Hysteresis Morphology Thiophene Aluminum electrodes Annealing temperatures Benzothiophene Capacitive humidity sensors Different frequency Hydrophobic nature Polythiophene derivatives Thermal-annealing Capacitive sensors |
| Type | Article |
| Pagination | 146-153 |
| Volume Number | 235 |
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