Sensitivity enhancement of acetone gas sensor using polyethylene glycol/multi-walled carbon nanotubes composite sensing film with thermal treatment

Jin-Chern Chiou, Chin Cheng Wu*, Tse Mei Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

There is a need to develop a chemiresistive gas sensor equipped with a thermostat over a wide area for the sensor, which can protect the sensor from the influence of ambient temperature due to the uniform temperature of the thermostat. In this paper, we demonstrated an acetone gas sensor based on a polyethylene glycol (PEG)/Multi-walled Carbon Nanotubes (MWCNTs) composite film, which was equipped with a thermostat. The sensor was operated at modest working temperatures for sensor sensitivity enhancement. The optimum design of the polyimide-based thermostat with widely uniform thermal distribution was investigated in detail. It was found that the temperature uniformity of the thermostat was achieved using double spiral geometry. The experimental results of the sensor response showed that the PEG/MWCNTs composite film with a moderate working temperature revealed a higher sensitivity than that without thermal treatment. Moreover, the sensing mechanisms of the PEG/MWCNTs composite gas sensor to acetone vapor were studied as well.

Original languageEnglish
Article number423
JournalPolymers
Volume11
Issue number3
DOIs
StatePublished - 1 Mar 2019

Keywords

  • Acetone
  • Multi-walled Carbon Nanotubes
  • Polyethylene glycol
  • Temperature effect
  • Thermal distribution
  • Thermostat

Fingerprint Dive into the research topics of 'Sensitivity enhancement of acetone gas sensor using polyethylene glycol/multi-walled carbon nanotubes composite sensing film with thermal treatment'. Together they form a unique fingerprint.

Cite this