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Proceedings Paper

OLED-based sensor array for simultaneous monitoring of multiple analytes
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Paper Abstract

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 2×2 mm2, 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.

Paper Details

Date Published: 12 September 2007
PDF: 8 pages
Proc. SPIE 6659, Organic-based Chemical and Biological Sensors, 665907 (12 September 2007); doi: 10.1117/12.735845
Show Author Affiliations
Yuankun Cai, Iowa State Univ. (United States)
Ruth Shinar, Iowa State Univ. (United States)
Zhaoqun Zhou, Iowa State Univ. (United States)
Joseph Shinar, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 6659:
Organic-based Chemical and Biological Sensors
Ruth Shinar; George G. Malliaras, Editor(s)

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