Dual luminophore polystyrene microspheres for pressure-sensitive luminescent imaging

Kimura, Fletcher; Khalil, Gamal; Zettsu, Nobuyuki; Xia, Younan; Callis, James B.; Gouterman, Martin; Dalton, Larry R.; Dabiri, Dana; Rodríguez, Miguel

doi:10.1088/0957-0233/17/6/s04

Cited by 54 publications

(27 citation statements)

References 17 publications

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“…Platinum (II) and palladium (II) porphyrins [9-12], are typical fluorescence-based oxygen sensors. Advantages of these materials include their long triplet-state lifetimes (in a range of 20 to 70 microsecond) and sufficient triplet-triplet energy transfer from these compounds to oxygen molecules, resulting in a decrease of the oxygen sensors' emission intensities, a shortening of their lifetimes by oxygen, and generation of singlet oxygen.…”

Section: Introductionmentioning

confidence: 99%

“…Advantages of these materials include their long triplet-state lifetimes (in a range of 20 to 70 microsecond) and sufficient triplet-triplet energy transfer from these compounds to oxygen molecules, resulting in a decrease of the oxygen sensors' emission intensities, a shortening of their lifetimes by oxygen, and generation of singlet oxygen. These porphyrin derivatives are usually physically trapped in various polymer matrices including silicon rubbers or gels, polystyrene, cellulose derivatives, and polyurethane-type hydrogels [4 - 12]. A potential drawback associated with physical trapping is leaching of probes from the matrix when submersed in aqueous solutions [5, 13] This is especially problematic with protracted soaking in cell culture medium at 37°C, since leaching may cause inaccurate measurements and cytotoxicity.…”

Section: Introductionmentioning

confidence: 99%

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Dually fluorescent sensing of pH and dissolved oxygen using a membrane made from polymerizable sensing monomers

Tian

Shumway

Youngbull

et al. 2010

Sensors and Actuators B: Chemical

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Using a thermal polymerization approach and polymerizable pH and oxygen sensing monomers with green and red emission spectra, respectively, new pH, oxygen, and their dual sensing membranes were prepared using poly(2-hydroxyethyl methacrylate)-co-poly(acrylamide) as a matrix. The sensors were grafted on acrylate-modified quartz glass and characterized under different pH values, oxygen concentrations, ion strengths, temperatures and cell culture media. The pH and oxygen sensors were excited using the same excitation wavelength and exhibited well-separated emission spectra. The pH-sensing films showed good response over the pH range 5.5 to 8.5, corresponding to pKa values in the biologically-relevant range between 6.9 and 7.1. The oxygen-sensing films exhibited linear Stern-Volmer quenching responses to dissolved oxygen. As the sensing membranes were prepared using thermally initiated polymerization of sensing moiety-containing monomers, no leaching of the sensors from the membranes to buffers or medium was observed. This advantageous characteristic accounts in part for the sensors' biocompatibility without apparent toxicity to HeLa cells after 40 hours incubation. The dual-sensing membrane was used to measure pH and dissolved oxygen simultaneously. The measured results correlated with the set-point values.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dually fluorescent sensing of pH and dissolved oxygen using a membrane made from polymerizable sensing monomers

Tian

Shumway

Youngbull

et al. 2010

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

show abstract

“…Notably, the polar solvents could also play the part of reductant in some cases such as polyol synthesis, being performed for the synthesis of many metallic NPs, especially platinum group metals. The polyols possess the ability to efficiently dissolve many metal precursors and a temperature dependent reducing power range from 140 to 160°C [196][197][198]. Among the reaction temperature sections, the polyol such as EG primarily being oxidized into glycolaldehyde by the oxygen in air, rather than acetaldehyde, which has been firmly regarded as the reducing agent for the reduction of metal precursors in a typical polyol synthesis [199].…”

Section: Reduction Reaction For Monometallic Ncsmentioning

confidence: 99%

Understanding of the major reactions in solution synthesis of functional nanomaterials

Wang

2016

Sci. China Mater.

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This review covers the major reactions involved in the solution synthesis of nanomaterials. It was designed to classify the traditional strategies such as precipitation, reduction, seed growth, etching, and so on into two basic processes which are termed as bottom-up and top-down routines. The discussion is focused on the basic mechanism and principles during the nucleation and growth of nanocrystals, especially in the solution system. This review also presents a prediction for how to utilize these intrinsic processes to artificially construct the desired specific and functional nanostructures. We try to describe the most directive and effective way to control the structures of nanocrystals for researchers who can master the major reaction mechanism and grasp the basic technologies in synthetic nanoscience.

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“…However, apart from their limited applicability range, the bubble markers provide only scarce data points, while also the pressure is not obtained simultaneously with the velocity measurement. More recently, the use of PSP coated particles has been proposed for pressure or simultaneous velocity and pressure measurement (Abe et al 2004, Kimura et al 2006.…”

Section: Introductionmentioning

confidence: 99%

PIV-based pressure measurement

Oudheusden

2013

Meas. Sci. Technol.

316

156

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The topic of this paper is a review of the approach to extract pressure fields from flow velocity field data, typically obtained with Particle Image Velocmetry (PIV), by combining the experimental data with the governing equations. Although the basic working principles on which this procedure relies have been known for quite some time, the recent expansion of PIV capabilities have greatly increased its practical potential, up to the extent that nowadays a time-resolved volumetric pressure determination has become feasible. This has led to a novel diagnostic methodology for determining the instantaneous flow field pressure in a nonintrusive way, which is rapidly finding acceptance in an increasing variety of application areas. The current review describes the operating principles, illustrating how the flow governing equations, in particular the equation of momentum, are employed to compute the pressure from the material acceleration of the flow. Accuracy aspects are discussed in relation to the most dominating experimental influences, notably the accuracy of the velocity source data, the temporal and spatial resolution and the method invoked to estimate the material derivative. In view of its nature of an emerging technique, recently published dedicated validation studies will be given specific attention. Different application areas are addressed, including turbulent flows, aeroacoustics, unsteady wing aerodynamics and other aeronautical applications.

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Dual luminophore polystyrene microspheres for pressure-sensitive luminescent imaging

Cited by 54 publications

References 17 publications

Dually fluorescent sensing of pH and dissolved oxygen using a membrane made from polymerizable sensing monomers

Dually fluorescent sensing of pH and dissolved oxygen using a membrane made from polymerizable sensing monomers

Understanding of the major reactions in solution synthesis of functional nanomaterials

PIV-based pressure measurement

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