Novel UV-activated colorimetric oxygen indicator

Lee, S-K. and Sheridan, M. and Mills, A. (2005) Novel UV-activated colorimetric oxygen indicator. Chemistry of Materials, 17 (10). pp. 2744-2751. ISSN 0897-4756 (http://dx.doi.org/10.1021/cm0403863)

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.

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• Item metadata

  Item type:	Article
  ID code:	460
  Dates:	Date Event 17 May 2005 Published
  Subjects:	Science > Chemistry
  Department:	Faculty of Science > Pure and Applied Chemistry Unknown Department
  Depositing user:	Mr Derek Boyle
  Date deposited:	09 Mar 2006
  Last modified:	11 Nov 2024 08:31
  Related URLs:	http://pubs.acs.org/cgi-bin/article.cgi/...
  URI:	https://strathprints.strath.ac.uk/id/eprint/460