Chiral Liquid Crystal-Based Sensor for the Detection of Low Humidity

YILMAZ CANLI N., Ozdemir Z. G.

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, vol.623, no.1, pp.64-73, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 623 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.1080/15421406.2015.1010857
  • Journal Name: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.64-73
  • Keywords: Chiral liquid crystal, Elovich equation, humidity sensor, response time, sensitivity, THIN-FILMS, ELOVICH EQUATION, MECHANISMS, COMPOUND, KINETICS, IN2O3, GAP
  • Ankara University Affiliated: No

Abstract

The humidity sensing capability of a film of (S)-5-octyloxy-2-[{4-(2-methylbuthoxy)-phenylimino}-methyl]-phenol liquid crystal (LC) was studied. The experimental results show that LC thin film offers a promising perspective as a sensing material for the detection of relatively low humidity levels at even room temperature. It was observed that the operating temperature has a considerable effect on humidity sensing performance of the sensor. A comparison of kinetic models applied to the adsorption of water molecules on the LC film was evaluated for the Ritchie and Elovich kinetic models. Linear regression analysis results show that Elovich equation provides the best correlation for the water molecule adsorption processes.