title: Development of an integrated optic oxygen sensor using a novel, generic platform.
abstract: This paper describes the development of a generic platform for enhanced, integrated optic sensors based on fluorescence detection. The platform employs a novel optical configuration in order to achieve enhanced performance and has inherent multianalyte detection capability. The sensor element comprises a multimode ridge waveguide that has been patterned with an analyte-sensitive fluorescent spot, which is excited directly using a LED. The platform was applied to the detection of gaseous oxygen as a proof of principle. The sol-gel-derived sensor spots were doped with an oxygen-sensitive fluorescent dichlororuthenium dye complex and intensity-based calibration data were generated from the oxygen-dependent waveguide output. The sensor achieved a LOD of 0.62% and a resolution of less than 0.96% gaseous oxygen, which compares favourably with a similar, recently reported system. This device highlights the combination of inexpensive rapid prototyping techniques and a dedicated sensor enhancement strategy that together facilitate the production of an effective prototype sensor platform.
authors.affiliation: National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Dublin 9, Ireland.
authors.forename: Conor S
authors.initials: CS
authors.lastname: Burke
authors.forename: Orla
authors.initials: O
authors.lastname: McGaughey
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Sabattié
authors.forename: Henry
authors.initials: H
authors.lastname: Barry
authors.forename: Aisling K
authors.initials: AK
authors.lastname: McEvoy
authors.forename: Colette
authors.initials: C
authors.lastname: McDonagh
authors.forename: Brian D
authors.initials: BD
authors.lastname: MacCraith