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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 2×2 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 (O2).
Published in:
Electronics Letters
(Volume:41
,
Issue:
18
)
Date of Publication: 1 Sept. 2005
- Page(s):
- 1031 - 1033
- ISSN :
- 0013-5194
- INSPEC Accession Number:
- 8583136
- Digital Object Identifier :
- 10.1049/el:20052142
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 26 September 2005
- Issue Date :
- 1 Sept. 2005
- Sponsored by :
- Institution of Engineering and Technology
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