Issue 2, 2001
From the journal:

Journal of Materials Chemistry

O. Worsfold,a   C. M. Dooling,a   T. H. Richardson,*a   M.O. Vysotsky,b   R. Tregonning,b   C.A. Hunterb  and  C. Malinsc  

* Corresponding authors

a Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
E-mail: T.Richardson@Sheffield.ac.uk
Fax: +44-0114-2728079
Tel: +44-0114-2224280

b Department of Chemistry, University of Sheffield, Sheffield, UK

c Department of Instrumentation and Analytical Science, UMIST, P. O. Box 88, Manchester, UK

Abstract

An optical gas sensor device based on tetra-substituted porphyrin dye entrapped in sol–gel glass displays greatly improved signal strength (1400% at 295 K) on exposure to 4.4 ppm nitrogen dioxide (in N2) gas compared to a multilayer Langmuir–Blodgett film fabricated from the same porphyrin. Temporal response was found to be similar, but differences in the two deposition methods were observed in terms of signal strength and response/recovery times. This behaviour is explained in terms of the differing nature of the two film types. A room temperature sensitivity of 176 ppb was measured and the response obeyed Langmuir adsorption kinetics.

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Article information

DOI
https://doi.org/10.1039/B006344O
Article type
Paper
Submitted
03 Aug 2000
Accepted
02 Nov 2000
First published
14 Dec 2000

J. Mater. Chem., 2001,11, 399-403

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Nitrogen dioxide sensing characteristics at elevated temperature of sol–gel glass thin films containing substituted porphyrin dyes

O. Worsfold, C. M. Dooling, T. H. Richardson, M.O. Vysotsky, R. Tregonning, C.A. Hunter and C. Malins, J. Mater. Chem., 2001, 11, 399 DOI: 10.1039/B006344O

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