By Topic

New optical sensor for volatile organic compounds (VOC) using birefringent porous glass

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Pinet, E. ; FISO Technol. Inc., Que., Canada ; Vachon-Savary, M. ; Dube, S.

Changes observed in polarized light transmission through an anisotropic material, such as birefringent porous glass, upon contact with air bearing vapors of volatile organic compounds serve as the basis for a very sensitive broadband chemical sensor. When properly designed, vapor sensors based on such porous glasses show changes in transmitted light intensity or spectral content (color) detectable by eye. When placed between two crossed polarizers, the form-birefringent porous glass produces an observable phase shift that undergoes a readily detectable decrease upon exposure to all organic vapors we tested thus far. The optical effects resulting from exposure to vapors are reversible and believed to result from capillary condensation of solvent vapors and attendant reduction of anisotropy. A good control of the microporous structure as well of the surface chemistry offers flexibility for tuning the sensor response to VOC industrial applications. Simple sensor miniaturization with low cost materials is possible.

Published in:

Sensors, 2004. Proceedings of IEEE

Date of Conference:

24-27 Oct. 2004