Scintillator Light Source for Chemical Sensing in the Near-Ultraviolet

Hobbs, Steven E.; Potyrailo, Radislav A.; Hieftje, Gary M.

doi:10.1021/ac961296n

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…The use of an RL light source for photometric measurements is not new. − For example, RL light sources have been used in process monitoring, time-resolved fluorescence, ,,,, UV absorption, steady-state fluorescence, ,,,,,, flow injection analysis, and temperature sensing . In comparison to a conventional light source, an RL light source is more simple, reliable, and compact, it is less prone to induce photochemical reactions, it exhibits a highly stable emission intensity, , and the RL per se requires no electrical power.…”

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confidence: 99%

Radioluminescent Light Source for the Development of Optical Sensor Arrays

et al. 2004

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A radioluminescent (RL) light source is evaluated for the development of photonically based chemical-responsive sensor arrays (CRSAs). The RL light source is comprised of a strontium-90 (90Sr) radionuclide and a plastic scintillator. The beta particles emitted from the 90Sr generate blue light (lambda(max) = 435 nm) from the plastic scintillator, and the blue light excites the analyte-responsive luminophores within the CRSA. To assess the RL light source utility, we have determined the analytical figures of merit from two tris(4,7'-diphenyl-1,10'-phenathroline)ruthenium(II)-doped xerogel-based sensor platforms: (i) a planar 5 x 5 multielement array and (ii) a discrete sensor element formed on the proximal face of poly(styrene) pillars that have a frustrated cone (frustum) geometry. We compare the performance from each platform when it is excited by a He-Cd laser (442 nm), a blue light-emitting diode (460-470 nm), and the RL light source. The RL light source yields results that are statistically equivalent to results from either electrically powered light source. The RL light source consumes no electrical power, is compact and simple, and has an extremely stable time-averaged signal. The primary trade-offs for these advantages are the RL light source's lower radiant power and the corresponding longer data acquisition times.

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confidence: 99%

Radioluminescent Light Source for the Development of Optical Sensor Arrays

et al. 2004

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“…[94] As a result of these developments, a high-throughput screening method has been implemented at Avery that quickly screens coating arrays. [33,95,96] For the screening of oxygen barrier properties, a dynamic fluorescence quenching of an organic fluorophore incorporated into a polymer matrix [97][98][99][100] has been implemented. Platinum octaethylporphyrin embedded within poly[1-(trimethylsilyl)-1-propyne] or poly(styreneco-trifluoroethyl methacrylate) has shown extremely high sensitivity to oxygen with an I N2 /I O2 ratio of over 200.…”

Section: Sensors In Contact With Species Transported Through Polymermentioning

confidence: 99%

Sensors in Combinatorial Polymer Research

Potyrailo

2003

Macromol. Rapid Commun.

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Summary: This review highlights the broad potential of sensor technologies for combinatorial polymer research. Advances in components microfabrication, electronics, transducers, and data analysis in the area of sensors can stimulate the development of many more new concepts applicable for rapid polymer screening. These advances are already impacting on several phases in a typical combinatorial discovery cycle that include parallel synthesis of polymers, their performance testing, evaluation of properties, and processing of collected data. It is demonstrated that sensors provide an attractive addition to the infrastructure of the analytical instruments used for screening of intrinsic and performance polymer properties.Impact of sensor technologies on the combinatorial discovery cycle.magnified imageImpact of sensor technologies on the combinatorial discovery cycle.

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“…In recent years, light sources composed of a scintillating material and a radionuclide have been studied extensively for spectrochemical applications. [1][2][3][4][5][6] These radioluminescent light (RL) sources have been used in applications such as UV-visible absorption detectors for liquid chromatography, 7 process monitoring, 8 and flow-injection analysis. 9 Additionally, RL sources have been used as chemical-based sensors 10 and in time-resolved fluorescence measurements.…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of a directly polarized radioluminescent light source

Barnes

Hieftje

2004

Analyst

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The properties of several directly polarized radioluminescent light (RL) sources are described. The RL sources are composed of a [small beta]-particle-emitting (90)Sr radioisotope coupled to polarization-oriented light-emitting plastic scintillators. The polarization of the scintillator molecules was achieved through a mechanical stress applied to the polymer matrix. The emission stability of the RL sources is described. It was found that the degree of polarization of light emitted by the sources varied from zero to 26%, depending on the matrix and scintillating material. The RL source with the highest degree of polarization was constructed from polystyrene and anthracene.

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Scintillator Light Source for Chemical Sensing in the Near-Ultraviolet

Cited by 9 publications

References 24 publications

Radioluminescent Light Source for the Development of Optical Sensor Arrays

Radioluminescent Light Source for the Development of Optical Sensor Arrays

Sensors in Combinatorial Polymer Research

Design and characterization of a directly polarized radioluminescent light source

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