| View Larger Image | Oxygen-sensing film coated photodetectors for portable instrumentation [An article from: Analytica Chimica Acta] | Digitalby L.F. Capitan-Vallvey (Author), L.J. Asensio (Author), Lopez-Gonzalez (Author)
| List Price: | $10.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Publication Date: | January 30, 2007 |
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Product Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: A sensor configuration for oxygen determination based on luminescence quenching is presented in which the measured parameter is closely related to the luminescence lifetime. The sensing film is based on the dye platinum octaethylporphyrin complex immobilised in a polystyrene membrane and stabilised with the heterocyclic amine DABCO. In this report, we study the feasibility of using photodiodes as elements to be coated by this oxygen sensing film with the aim of obtaining a sensing device whose small size makes it possible to embed it into a portable measurement system. In addition to the concomitant sensor miniaturisation, several advantages have been demonstrated such as fast response, low energy consumption, the lack of any need for optical filter elements and less tendency to photobleaching than with previous configurations. A complete study of the coated photodetector preparation was carried out in order to optimise the specifications of the portable instrument where the photodetector is included, such as: repeatability, transient response and selectivity. We propose a preparation procedure for coating photodetectors with this film that has demonstrated the capacity to produce repetitive and reliable sensing devices. |
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