Journal
ELECTRONICS LETTERS
Volume 41, Issue 18, Pages 1031-1033Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el:20052142
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An optical multi-sensor system based on the excited-state lifetime of luminophore doped xerogels is described. The system is based on the novel concept of combining addressable surface-mount light-emitting diode (SM-LED) arrays with doped xerogel thin films; each SM-LED in the array is coated with a different xerogel-based sensor element. Each sensor element exhibits a unique response profile to the target analyte. A prototype system with a 2 x 2 LED array is presented, with three of the LEDs coated with xerogel-based sensing layers, each layer having a different sensitivity and response profile to oxygen (O-2).
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