Borisov, Sergey M. and Vasylevska, A. S. and Krause, Christian and Wolfbeis, Otto S. (2006) Composite Luminescent Material for Dual Sensing of Oxygen and Temperature. Advanced Functional Materials 16 (12), pp. 1536-1542.
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A novel kind of composite material is presented that contains two indicators incorporated into a single polymer matrix, thus allowing simultaneous determination of oxygen partial pressure and temperature. The temperature-sensitive dye (ruthenium tris-1,10-phenanthroline) was chosen for its highly temperature-dependent luminescence which is the highest among the RuII polypyridyl complexes. A fluorinated palladium(II) tetraphenylporphyrin served as the oxygen probe. The indicators were incorporated into either poly(styrene-co-acrylonitrile) microparticles (to sense oxygen) or into poly(acrylonitrile) (for temperature sensing, since this polymer is virtually impermeable to oxygen). The luminescence of both dyes can be separated either spectrally (due to different absorption and emission spectra of the indicators) or via luminescence decay time. The material is suitable for temperature-compensated oxygen sensing, for example, in high-resolution oxygen profiling, and for imaging temperature in the range between 0 and 60 °C. This enables one to “see” (rather than to “feel”) temperature in this important range. Simultaneous imaging of pressure and temperature also has been achieved. It enables contactless imaging of the two parameters, for example, in wind tunnels. Due to the use of a biocompatible hydrogel matrix, the material conceivably is suited for biomedical applications.
|Institutions:||Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Otto S. Wolfbeis)|
|Keywords:||Dyes; Luminescence; Polymer composites; Sensing, gas; Sensing, temperature|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||18 Mar 2011 08:12|
|Last Modified:||21 Jul 2011 02:09|