Novel UV-activated colorimetric oxygen indicator

S-K. Lee, M. Sheridan, A. Mills

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

The results of a detailed characterization study of a novel UV-activated colorimetric oxygen indicator are described. The indicator uses nanoparticles of titania to photosensitize the reduction of methylene blue by triethanolamine in a polymer encapsulation medium, using UVA light. Upon UV irradiation, the indicator bleaches and remains in this colorless state in the dark, unless and until it is exposed to oxygen, whereupon its original color is restored. The indicator is reusable and irreversible. The rate of color recovery is proportional to the level of oxygen present. A layer of PET (poly(ethylene terephthalate)), of thickness b, placed on top of the indicator film slows down its response, and the 90% recovery time is proportional to b.
LanguageEnglish
Pages2744-2751
Number of pages7
JournalChemistry of Materials
Volume17
Issue number10
DOIs
Publication statusPublished - 17 May 2005

Fingerprint

Oxygen
Color
Triethanolamine
Recovery
Polyethylene Terephthalates
Methylene Blue
Encapsulation
Polyethylene terephthalates
Polymers
Titanium
Irradiation
Nanoparticles
triethanolamine
titanium dioxide

Keywords

  • methylene-blue
  • electron-transfer
  • ascorbic-acid
  • sensor
  • kinetics
  • water
  • film

Cite this

Lee, S-K. ; Sheridan, M. ; Mills, A. / Novel UV-activated colorimetric oxygen indicator. In: Chemistry of Materials. 2005 ; Vol. 17, No. 10. pp. 2744-2751.
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Lee, S-K, Sheridan, M & Mills, A 2005, 'Novel UV-activated colorimetric oxygen indicator' Chemistry of Materials, vol. 17, no. 10, pp. 2744-2751. https://doi.org/10.1021/cm0403863

Novel UV-activated colorimetric oxygen indicator. / Lee, S-K.; Sheridan, M.; Mills, A.

In: Chemistry of Materials, Vol. 17, No. 10, 17.05.2005, p. 2744-2751.

Research output: Contribution to journalArticle

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AU - Sheridan, M.

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KW - methylene-blue

KW - electron-transfer

KW - ascorbic-acid

KW - sensor

KW - kinetics

KW - water

KW - film

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