7.5.1 α-Cyclodextrin Functionalized Planar Bragg Grating Sensor for the Detection of Small Arene Traces in Solvent Vapour
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 7.5 Chemical Sensors using Optical Technologies
- Author(s)
- M. Girschikofsky, M. Rosenberger, S. Belle, R. Hellmann - University of Applied Sciences Aschaffenburg (Germany), M. Brutschy, S. Waldvogel - Johannes Gutenberg-University Mainz, Institute of Organic Chemistry (Germany)
- Pages
- 646 - 648
- DOI
- 10.5162/IMCS2012/7.5.1
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
We report on an optical sensor system, which is highly sensitive to small traces of arenes in solvent vapour. The sensor system is based on a planar Bragg grating refractive index sensor which is sensitised towards arenes by applying a thin layer of substituted alpha-cyclodextrins to the sensor surface by dip coating. In our studies using benzene as a representative of arenes, the dependence of the spectral shift of the reflected Bragg wavelength on variation of the benzene concentration was found to 8 pm/100 ppm. Considering the spectral resolution of the interrogation system with reliable signal identification, this leads to a minimum detectable benzene concentration of 75 ppm.