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Proceedings Paper

Recent developments in liquid phase mid-infrared sensor technology
Author(s): Markus Janotta; Boris Mizaikoff
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Paper Abstract

The potential of mid-infrared optical sensing technology for liquid phase applications is tightly related to the implementation of appropriate chemical modifications of the sensing surface. Besides recognition and enrichment of analyte molecules, suppression of interfering water absorptions is of substantial interest. Utilizing the principle of evanescent wave spectroscopy for the signal generation is the basis for the realization of powerful spectroscopic sensing systems, which provide access to molecule specific vibrations of organic analytes. With the availability of mid-infrared transparent fiberoptic materials, access to the mid-infrared spectral region from 220 micrometers is gained, enabling remote qualitative and quantitative analysis. Besides polymeric molecular recognition and enrichment layers, sol-gel films are among the most promising surface modification. This highly reproducible process allows detailed control on the surface properties of the sol-gel layer formed at the waveguide surface. Due to the inertness and robustness of sol-gel coatings they can be considered among the most promising surface modification materials for optical sensors applied in the biomedical and biological field.

Paper Details

Date Published: 26 March 2002
PDF: 8 pages
Proc. SPIE 4616, Optical Fibers and Sensors for Medical Applications II, (26 March 2002); doi: 10.1117/12.463796
Show Author Affiliations
Markus Janotta, Georgia Institute of Technology (United States)
Boris Mizaikoff, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 4616:
Optical Fibers and Sensors for Medical Applications II
Israel Gannot, Editor(s)

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