OLED-based sensor array for simultaneous monitoring of multiple analytes - art. no. 665907

TitleOLED-based sensor array for simultaneous monitoring of multiple analytes - art. no. 665907
Publication TypeBook Chapter
Year of Publication2007
AuthorsCai Y, Shinar R, Zhou Z, Shinar J
EditorShinar R, Malliaras GG
Book TitleOrganic-Based Chemical and Biological Sensors
PublisherSpie-Int Soc Optical Engineering
Series TitleProceedings of the Society of Photo-Optical Instrumentation Engineers (Spie)
ISBN Number0277-786X978-0-8194-6807
Accession NumberISI:000251493200004
Keywordsdevices, dissolved oxygen sensor, ethanol sensor, GLUCOSE, glucose sensor, lactate sensor, MULTIANALYTE IMMUNOASSAYS, Multianalyte sensor arrays, OLEDs, Organic light emitting devices, oxygen

A compact, photoluminescence (PL)-based sensor array, utilizing tris(quinolinolate) Al OLED pixels as the excitation sources, for sequential or simultaneous monitoring of dissolved oxygen (DO), glucose, lactate, and alcohol, is described. The DO is monitored through its effect on the PL lifetime of the oxygen-sensitive dye Pt octaethylporphyrin (PtOEP) embedded in a polystyrene film. The other analytes are monitored through their oxidation, catalyzed by an appropriate oxidase, which reduces the amount of DO in their vicinity. The OLED pixels are fabricated on a glass substrate; each pixel is typically 2x2 mm(2), with a 2 mm gap between the pixels. Two OLED pixels are associated with the detection of each of the analytes. The pixels are individually addressable, enabling consecutive detection of the different analytes within a few minutes utilizing a single photodetector (PD). Simultaneous detection is achieved by using an array of PDs. The OLED-based sensing array is compact and uniquely simple in its ease of fabrication and integration. Its performance attributes are comparable to those obtained for a single analyte using any excitation source. The potential of small-size, multi-color OLED pixel arrays for multianalyte detection is also discussed.