Novel titania sol-gel derived film for luminescence-based oxygen sensing.

A. Mills, A. Graham, C. O'Rourke

Research output: Contribution to journalArticle

11 Citations (Scopus)


A novel method for the preparation of titania sol–gel derived oxygen sensors based on the ruthenium(II) dye, [Ru(bpy)3]2+, is described. A titania sol–gel paste film was cast onto microscope slides, and the dye ion-paired to the deprotonated, hydroxylated groups on the film's surface from an aqueous solution of the dye at pH 11. The resulting sensor film is extremely oxygen sensitive, with a PO2 (S = 1/2) value (i.e. the partial pressure of oxygen required in order to reduce the original, oxygen free, luminescence intensity by 50%) of 0.011 atm. The sensor undergoes 95% response to oxygen in 4 s, and shows 95% recovery of its luminescence in argon within 7 s.
Original languageEnglish
Pages (from-to)907-912, Impact Factor: 4.1
Number of pages6
JournalSensors and Actuators B: Chemical
Early online date12 Sep 2013
Publication statusPublished - 2014

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