Liquid crystal nose,chiral case: towards increased selectivity and low detection limits |
| |
| Authors: | PV Shibaev D Carrozzi L Vigilia Haley DeWeese |
| |
| Institution: | 1. Department of Physics, Fordham University, New York, NY, USAshibayev@fordham.edu;3. Department of Physics, Fordham University, New York, NY, USA |
| |
| Abstract: | In this paper, we describe a simple prototype of an olfaction system based on chiral liquid crystals (LCs) and suitable for sensing volatile organic compounds (VOCs). The detection of small concentrations of VOCs is based on measuring weak colour fluctuations on the surface of the LC droplet. Detection of larger concentrations is based on measuring colour changes (or shift of the selective reflection band) and isotropisation transition of the whole droplet. Thus, a broad range of VOC concentrations can be detected by this LC nose. |
| |
| Keywords: | LC nose electronic nose olfaction gas detection liquid crystals cholesteric volatile organic compound VOC |
|
|
