Jump to main content
Jump to site search

Issue 11, 2008
Previous Article Next Article

Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

Author affiliations

Abstract

A chemical sensor based on a coated long-period grating has been prepared and characterized. Designer coatings based on polydimethylsiloxane were prepared by the incorporation of diphenylsiloxane and titanium cross-linker in order to provide enhanced sensitivity for a variety of key environmental pollutants and optimal refractive index of the coating. Upon microextraction of the analyte into the polymer matrix, an increase in the refractive index of the coating resulted in a change in the attenuation spectrum of the long-period grating. The grating was interrogated using ring-down detection as a means to amplify the optical loss and to gain stability against misalignment and power fluctuations. Chemical differentiation of cyclohexane and xylene was achieved and a detection limit of 300 ppm of xylene vapour was realized.

Graphical abstract: Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

Back to tab navigation

Publication details

The article was received on 11 Apr 2008, accepted on 31 Jul 2008 and first published on 11 Sep 2008


Article type: Paper
DOI: 10.1039/B806129G
Citation: Analyst, 2008,133, 1541-1549

  •   Request permissions

    Chemical sensor based on a long-period fibre grating modified by a functionalized polydimethylsiloxane coating

    J. Barnes, M. Dreher, K. Plett, R. S. Brown, C. M. Crudden and H. Loock, Analyst, 2008, 133, 1541
    DOI: 10.1039/B806129G

Search articles by author

Spotlight

Advertisements