Low-temperature and fast response H2S gas sensor using semiconducting chitosan film

Ayah F.S. Abu-Hani, Yaser E. Greish, Saleh T. Mahmoud, Falah Awwad, Ahmad I. Ayesh

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)


We report on novel, highly sensitive and low-temperature H2S gas sensor based on chitosan (CS) film with engineered conductivity. The conductivity of the chitosan film is controlled by blending it with glycerol ionic liquid (IL) with different concentrations 1–9% volume/volume (v/v). The optimum conductivity of the film is depicted at 5% (v/v) concentration of glycerol. The fabricated films are flexible, transparent and hold semiconducting properties. The gas sensing performance was investigated for chitosan – 5% IL film. Results showed high sensitivity as well as selectivity for H2S gas, outstanding reproducibility, and long-term stability. The lowest operating temperature of the sensor was 20 °C, with a minimum gas detection limit of 15 ppm. Moreover, the sensor exhibits a reasonably fast response, with a minimum average response time of 14.9 ± 3.7 s. This sensor with its low-power consumption, high flexibility, and easy fabrication technique, has the potential to be used for practical industrial applications.

Original languageEnglish
Pages (from-to)677-684
Number of pages8
JournalSensors and Actuators, B: Chemical
Publication statusPublished - 2017


  • Chitosan
  • Glycerol
  • HS sensor
  • Semiconducting polymer

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


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