Effect of ammonia on optical absorption of polyaniline films

B. R. Tsizh*, O. I. Aksimentyeva, Ya I. Vertsimakha, P. M. Lutsyk, M. I. Chokhan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The influence of ammonia on the optical absorption of polyaniline films obtained by the electrochemical method is studied. In the presence of ammonia, the optical spectra of a polymer are found to change due to the appearance of a new absorption band with a maximum at 2.07 eV and a simultaneous decrease in the intensity of bands at 1.57 and 2.91 eV. The kinetics of changes showing the presence of an isobestic point at 2.71 eV is elaborated. The results can be used to optimize the ammonia gas sensors for monitoring the biotechnological processes in the food industry and the environment.

Original languageEnglish
Pages (from-to)116-123
Number of pages8
JournalMolecular Crystals and Liquid Crystals
Volume589
Issue number1
DOIs
Publication statusPublished - 22 Jan 2014

Keywords

  • gas sensor
  • optical absorption
  • Polyaniline films
  • sensitive element

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