Development of an integrated optic oxygen sensor using a novel, generic platform.
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.
Burke
Conor S
CS
National Centre for Sensor Research, School of Physical Sciences, Dublin City University, Dublin 9, Ireland.
McGaughey
Orla
O
Sabattié
Jean-Marc
JM
Barry
Henry
H
McEvoy
Aisling K
AK
McDonagh
Colette
C
MacCraith
Brian D
BD