By Topic

Rapid and sensitive optochemical nitrogen dioxide detection: Silicone-containing amphiphilic co-networks as well suited immobilization matrices for gas sensing

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
$33 $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)
Stephan Meskath ; Freiburg Materials Research Center, University of Freiburg, Germany ; Gerald Urban ; Jürgen Heinze

We present a new optical polymer thin film sensor for high sensitivity and rapid response gas detection. Amphiphilic polymer co-networks (APCN) are used as sensor matrices for fast nitrogen dioxide detection. The sensor consists of an APCN in which the indicator has been embedded. The APCNs were synthesized by free radical induced photo polymerization and result in poly(2-(dimethylamino)ethyl acrylate)-1-polydimethylsiloxane(PDMAEA-l-PDMS). Thin and optical clear films of nanophase-separated co-networks are formed which are well suited for simple impregnation with indicators. Due to the high gas permeability of silicone containing APCNs, accurate gas detection at the sub-ppm level is feasible within seconds. As a result of nanophase separation, there is a spatial separation between areas in which the indicator reagent is well immobilized and areas that advantageously take care of the diffusive transport of the analyte. Thanks to the huge interface between the heterogeneous phases and therefore the good accessibility of the indicator, it is possible to design sensors with high sensitivity. Here, we describe the determination of nitrogen dioxide in the sub ppm-range, which occurs within seconds, using DPPD (N,N'-diphenyl-1,4-phenylendiamine) as indicator. The thin film response is reproducible and irreversible. With our kinetic optical method response times within seconds were achieved.

Published in:

Sensors, 2010 IEEE

Date of Conference:

1-4 Nov. 2010