Behavior of toxic gas sensor based on conducting polypyrrole

Jung Joon Lee, Dohyuk Yoo, Chanil Park, Jung-Hyun Kim, Hyang Hee Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A sensor for two types of ammonia (NH3) and carbon monoxide (CO) is fabricated on silicon substrate by using the drop-coating method and the sensor performance is investigated. Polypyrrole, an electro-conductive plastic, is used as the sensing material of the gas sensor. The gas sensor functions to maintain a constant gate voltage in a state that facilitates measurement of the conductivity of the gate, source, and drain having a source electrode and the drain electrode of a field effect transistor channel between the structures. The sensor exhibits an increase/decrease of the resistance upon exposure to a low concentration of NH3 and CO gas. This approach can be applied for highly sensitive room-temperature sensing of CO and NH3 at sub-ppm concentrations and for the development of very low-power devices. The synthesized conducting polypyrrole was characterized via field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FTIR). The electronic transport properties of the sensors are measured in a field effect transistor geometry under ambient conditions. The sensing properties of the conducting polypyrrole gas sensor at sub-ppm gas concentrations are described.

Original languageEnglish
Pages (from-to)280-286
Number of pages7
JournalMacromolecular Symposia
Volume354
Issue number1
DOIs
Publication statusPublished - 2015 Aug 1

Fingerprint

Poisons
polypyrroles
Polypyrroles
Chemical sensors
Carbon Monoxide
Carbon monoxide
conduction
sensors
Sensors
Field effect transistors
gases
carbon monoxide
Conductive plastics
Gases
Electrodes
Silicon
Ammonia
Field emission
Transport properties
field effect transistors

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Lee, Jung Joon ; Yoo, Dohyuk ; Park, Chanil ; Kim, Jung-Hyun ; Choi, Hyang Hee. / Behavior of toxic gas sensor based on conducting polypyrrole. In: Macromolecular Symposia. 2015 ; Vol. 354, No. 1. pp. 280-286.
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Behavior of toxic gas sensor based on conducting polypyrrole. / Lee, Jung Joon; Yoo, Dohyuk; Park, Chanil; Kim, Jung-Hyun; Choi, Hyang Hee.

In: Macromolecular Symposia, Vol. 354, No. 1, 01.08.2015, p. 280-286.

Research output: Contribution to journalArticle

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