Influence of thermal annealing on a capacitive humidity sensor based on newly synthesized macroporous PBObzT2

Ehsan Raza, Muhammad Asif, Fakhra Aziz, Mohamad Izzat Azmer, Haseeb Ashraf Malik, Chin Hoong Teh, Mansoor Ani Najeeb, Qayyum Zafar, Zubair Ahmad, Fazal Wahab, Rusli Daik, Norazilawati Muhamad Sarih, Azzuliani Supangat, Khaulah Sulaiman

Research output: Contribution to journalArticle

14 Citations (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.

Original languageEnglish
Pages (from-to)146-153
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume235
DOIs
Publication statusPublished - 1 Nov 2016

Fingerprint

Capacitive sensors
Humidity sensors
humidity
Annealing
annealing
sensors
Sensors
Spin coating
Thiophene
Polymers
Polymer solutions
Benzene
Aluminum
Hysteresis
Capacitance
Derivatives
Fabrication
polymers
Electrodes
Hot Temperature

Keywords

  • Annealing
  • Capacitive humidity sensor
  • Hysteresis
  • Morphology
  • Polymer based benzothiophene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Influence of thermal annealing on a capacitive humidity sensor based on newly synthesized macroporous PBObzT2 . / Raza, Ehsan; Asif, Muhammad; Aziz, Fakhra; Azmer, Mohamad Izzat; Malik, Haseeb Ashraf; Teh, Chin Hoong; Najeeb, Mansoor Ani; Zafar, Qayyum; Ahmad, Zubair; Wahab, Fazal; Daik, Rusli; Sarih, Norazilawati Muhamad; Supangat, Azzuliani; Sulaiman, Khaulah.

In: Sensors and Actuators, B: Chemical, Vol. 235, 01.11.2016, p. 146-153.

Research output: Contribution to journalArticle

Raza, E, Asif, M, Aziz, F, Azmer, MI, Malik, HA, Teh, CH, Najeeb, MA, Zafar, Q, Ahmad, Z, Wahab, F, Daik, R, Sarih, NM, Supangat, A & Sulaiman, K 2016, 'Influence of thermal annealing on a capacitive humidity sensor based on newly synthesized macroporous PBObzT2 ', Sensors and Actuators, B: Chemical, vol. 235, pp. 146-153. https://doi.org/10.1016/j.snb.2016.05.071
Raza, Ehsan ; Asif, Muhammad ; Aziz, Fakhra ; Azmer, Mohamad Izzat ; Malik, Haseeb Ashraf ; Teh, Chin Hoong ; Najeeb, Mansoor Ani ; Zafar, Qayyum ; Ahmad, Zubair ; Wahab, Fazal ; Daik, Rusli ; Sarih, Norazilawati Muhamad ; Supangat, Azzuliani ; Sulaiman, Khaulah. / Influence of thermal annealing on a capacitive humidity sensor based on newly synthesized macroporous PBObzT2 In: Sensors and Actuators, B: Chemical. 2016 ; Vol. 235. pp. 146-153.
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