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AssigneeCoventry University
InventorsLewis Sidney Miller, David John Walton, Andrew Martin McRoberts, Andrew Laurence Newton, David Anthony Parry, Christopher G.D. Sykesud
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An optical sensor for detection of gases such as nitrogen oxides includes a thin film of an active material comprising a highly polarisable organic material deposited by the Langmuir-Blodgett technique or otherwise on a substrate and interrogated optically, to detect changes in at least one optical property such as reflectance or complex refractive index. Preferred materials include a specific polysiloxane and low-molecular-mass compounds (FIGS 1 to 5b), having specific electron donating and/or accepting groups, including azobenzenes. The optical change may include a visible colour change.
A method of detecting the presence of nitrogen oxide gases in a gas sample comprising one or more nitrogen oxide gases and one or more unknown gases including the steps of:
Dependencies are inferred from the claim text.