Dual-luminophor pressure-sensitive paint

Khalil, Gamal; Costin, Colin D.; Crafton, Jim; Jones, Grant; Grenoble, Severin; Gouterman, Martin; Callis, James B.; Dalton, Larry R.

doi:10.1016/s0925-4005(03)00484-2

Cited by 195 publications

(62 citation statements)

References 8 publications

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“…This effect can be minimized by addition of the reference dye, which however provides no information about the absolute temperature. [36,45] The DLD method is a self-referenced technique, revealing absolute p/T values over large surface areas without the need of extensive calibration. The particle/matrix polymer suspension can be sprayed on surfaces, being therefore applicable as a dual PSP/TSP for aerodynamic measurements in wind tunnels.…”

Section: Sensor Validationmentioning

confidence: 99%

A Dual Luminescent Sensor Material for Simultaneous Imaging of Pressure and Temperature on Surfaces

Stich

Nagl

Wolfbeis

et al. 2008

Adv Funct Materials

163

151

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A novel kind of composite material for simultaneous luminescent determination of air pressure and temperature is presented. The dual sensor consists of a fluorinated platinum porphyrin complex (PtTFPP) as an oxygen‐sensitive probe, and of the highly temperature‐sensitive europium complex Eu(tta)3(dpbt) as temperature probe. Both are incorporated into different polymer microparticles to control response characteristics and to avoid interferences. Encapsulation of PtTFPP in poly(styrene‐co‐acrylonitrile) (PSAN) results in a broad dynamic range from 0.05 to 2.00 bar for pressure measurements. The europium complex was incorporated into poly(vinyl chloride) to reduce the cross sensitivity towards oxygen. This system represents a new class of luminescent sensor system, where the signals are separated via the different luminescence lifetimes of the indicators. It is possible to monitor the emission of the temperature‐sensitive probe by means of time‐resolved fluorescence imaging without interferences, because the luminescence lifetime of the temperature indicator is tenfold longer than that of the oxygen indicator. The temperature image can then be used to compensate cross sensitivity of the pressure indicator towards temperature. In combination with an appropriate time‐resolved measurement technique, this material enables simultaneous imaging of pressure (or oxygen partial pressure) and temperature distributions on surfaces. It is distinguished from other approaches of dual pressure and temperature sensitive paints because it avoids the need of signal separation by application of different cameras or by use of different optical filters or light sources.

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Section: Sensor Validationmentioning

confidence: 99%

A Dual Luminescent Sensor Material for Simultaneous Imaging of Pressure and Temperature on Surfaces

Stich

Nagl

Wolfbeis

et al. 2008

Adv Funct Materials

163

151

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“…The pressure dependency of the temperature probe is displayed in Figure 7. Unlike other temperature sensors, [3,38,39] its calibration plot is linear over a rather wide temperature range, with a correlation coefficient R 2 of 0.999. The temperature coefficient of the decay time is 0.42 % 8C…”

Section: Compoundmentioning

confidence: 99%

Red‐ and Green‐Emitting Iridium(III) Complexes for a Dual Barometric and Temperature‐Sensitive Paint

Fischer

Stich

Wolfbeis

et al. 2009

Chemistry A European J

103

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A new dual luminescent sensitive paint for barometric pressure and temperature (T) is presented. The green-emitting iridium(III) complex [Ir(ppy)(2)(carbac)] (ppy=2-phenylpyridine; carbac=1-(9H-carbazol-9-yl)-5,5-dimethylhexane-2,4-dione) was applied as a novel probe for T along with the red-emitting complex [Ir(btpy)(3)], (btpy=2-(benzo[b]thiophene-2-yl)pyridine) which functions as a barometric (in fact oxygen-sensitive) probe. Both iridium complexes were dissolved in different polymer materials to achieve optimal responses. The probe [Ir(ppy)(2)(carbac)] was dispersed in gas-blocking poly(acrylonitrile) microparticles in order to suppress any quenching of its luminescence by oxygen. The barometric probe [Ir(btpy)(3)], in turn, was incorporated in a cellulose acetate butyrate film which exhibits good permeability for oxygen. The effects of temperature on the response of the oxygen probe can be corrected by simultaneous optical determination of T, as the poly(acrylonitrile) microparticles containing the temperature indicator are incorporated into the film. The phosphorescent signals of the probes for T and barometric pressure, respectively, can be separated by optical filters due to the approximately 75 nm difference in their emission maxima. The dual sensor is applicable to luminescence lifetime imaging of T and barometric pressure. It is the first luminescent dual sensor material for barometric pressure/T based exclusively on the use of Ir(III) complexes in combination with luminescence lifetime imaging.

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“…Some dual-luminophore PSPs were described previously where the signal of a reference dye was ratioed with that of an indicator in order to eliminate temperature effects. [37] However, a measurable temperature dependency was still encountered and temperature was not specified.…”

Section: Full Papermentioning

confidence: 99%

Composite Luminescent Material for Dual Sensing of Oxygen and Temperature

Borisov

Vasylevska

Krause

et al. 2006

Adv Funct Materials

179

137

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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.

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Dual-luminophor pressure-sensitive paint

Cited by 195 publications

References 8 publications

A Dual Luminescent Sensor Material for Simultaneous Imaging of Pressure and Temperature on Surfaces

A Dual Luminescent Sensor Material for Simultaneous Imaging of Pressure and Temperature on Surfaces

Red‐ and Green‐Emitting Iridium(III) Complexes for a Dual Barometric and Temperature‐Sensitive Paint

Composite Luminescent Material for Dual Sensing of Oxygen and Temperature

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