Applications of Distributed Optical Fiber Sensing: Fluorescent Assays of Linear Combinatorial Arrays

Geissinger, Peter; Schwabacher, Alan W.

doi:10.1007/978-0-306-48672-2_9

Cited by 3 publications

(3 citation statements)

References 63 publications

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“…In our setup, the luminescence is captured by a second fiber (referred to as "detection fibers") at right angle to the "excitation fiber" at every sensor region. The second fiber provides the time delay necessary to temporally resolve the signals originating at the sensor regions as seen in Figure 1 (for details see [36,37]). This allows for an increased spatial resolution in multisensor arrays, as we demonstrated with an array of 100 crossed fiber junctions in a space of 6 cm × 6 cm [38].…”

Section: Introductionmentioning

confidence: 99%

Crossed Optical Fiber Sensor Arrays for High-Spatial-Resolution Sensing: Application to Dissolved Oxygen Concentration Measurements

Rigo

Geissinger

2012

Journal of Sensors

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Optical fiber sensors using luminescent probes located along an optical fiber in the cladding of this fiber are of great interest for monitoring physical and chemical properties in their environment. The interrogation of a luminophore with a short laser pulse propagating through the fiber core allows for the measurement of the location of these luminophores. To increase the spatial resolution of such a measurements and to measure multiple analytes and properties in a confined space, a crossed optical fiber sensing platform can be employed. Here we describe the application of this platform to measuring the concentration of dissolved oxygen. The sensor is based on luminescence quenching of a ruthenium complex immobilized in a highly crosslinked film and covalently attached to the optical fibers. Both luminescence-intensity and luminescence-lifetime changes of the sensor molecules in response to changes in the concentration of oxygen dissolved in water are reported. For luminescence-intensity measurements, a second adjacent sensor region is employed as reference to account for laser pulse energy fluctuations. Enhanced quenching response in water is demonstrated by the use of organically modified poly(ethylene glycol) precursors, which increase the hydrophobicity of the film surface.

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Section: Introductionmentioning

confidence: 99%

Crossed Optical Fiber Sensor Arrays for High-Spatial-Resolution Sensing: Application to Dissolved Oxygen Concentration Measurements

Rigo

Geissinger

2012

Journal of Sensors

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“…(b) Fluorescence of free-standing fluorosensor films 10 with excitation at 450 nm, measured in fluorescence spectrometer. (c) Fluorescence of fluorosensor films 10 with excitation at 337 nm in fiber setup. , …”

Section: Resultsmentioning

confidence: 99%

Chemically Stable Films for Combinatorial Fluorosensor Arrays

et al. 2006

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Sensor arrays are useful for many purposes. Our interests include quasi-distributed intrinsic fiber optic arrays, those distributed along the length of an optical fiber. We have demonstrated an optical time-of-flight approach to distinguishing the fluorescence output of such arrays, as well as a synthesis of combinatorial libraries that takes advantage of a support of linear morphology to make numerous compounds in a simple manner without information loss in the synthesis. To unite these research areas, we needed an optical fiber cladding material that meets demanding synthetic and optical requirements. We have chosen the Meldal SPOCC polymer support as the best candidate for such a material and report here our initial results with this material.

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“…In this paper the modification of the radiative decay rate of the luminophore bis (2,2 -bipyridine)-(5-isothiocyanatophenanthroline) ruthenium through the metal-enhancedluminescence (MEL) phenomenon is demonstrated in a crossed-fiber sensor array configuration developed in our laboratory [13][14][15]. First we demonstrated the importance of the coupling between the silver nanoparticles plasmon modes and the emission band of ruthenium complex for modifying its RDR.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Optimization of Metal‐Nanoparticle‐Induced Luminescence Enhancement Factors in a Crossed‐Optical Fiber Configuration

Rigo

Geissinger

2010

Journal of Nanomaterials

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A crossed-optical-fiber configuration comprised of silver nanoparticles covalently attached to the core of an optical fiber and labeled with luminescent ruthenium molecules is reported. A second optical fiber was placed at right angle of the fiber containing the nanoparticle/ruthenium, to form a fiber-fiber junction, and it was used to detect the luminescence from the ruthenium molecules bound to the first fiber. To employ the effect of metal-enhanced luminescence, the ruthenium complex was kept at an appropriate distance from the nanoparticles by polyelectrolyte spacer layers. For silver nanospheres, nanotriangles and nanorods and for spacer-layer thicknesses from 2–14 nm luminescence-enhancement factors were determined. A 27-fold luminescence enhancement was found when the ruthenium complex was placed 4 nm from silver nanotriangles. Finally, a calibration curve for the oxygen dependence of luminescence intensities and lifetimes of ruthenium complex is presented suggesting that the oxygen sensing capabilities of the nanoengineered-ruthenium complex are maintained.

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Applications of Distributed Optical Fiber Sensing: Fluorescent Assays of Linear Combinatorial Arrays

Cited by 3 publications

References 63 publications

Crossed Optical Fiber Sensor Arrays for High-Spatial-Resolution Sensing: Application to Dissolved Oxygen Concentration Measurements

Crossed Optical Fiber Sensor Arrays for High-Spatial-Resolution Sensing: Application to Dissolved Oxygen Concentration Measurements

Chemically Stable Films for Combinatorial Fluorosensor Arrays

Measurement and Optimization of Metal‐Nanoparticle‐Induced Luminescence Enhancement Factors in a Crossed‐Optical Fiber Configuration

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