Biological detection by optical oxygen sensing

Papkovsky, Dmitri B.; Dmitriev, Ruslan I.

doi:10.1039/c3cs60131e

Cited by 383 publications

(292 citation statements)

References 322 publications

(503 reference statements)

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“…For luminescence O 2 sensing, the sensitivity is mainly determined by the O 2 permeability, the original luminescence lifetime, and the collision radius of the luminescent dye 117, 118, 119, 120. Precious metal (Pt, Ru, Au, Ir, Re, etc.)…”

Section: Radical Gases (O2)mentioning

confidence: 99%

Photoluminescent Metal–Organic Frameworks for Gas Sensing

et al. 2016

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Luminescence of porous coordination polymers (PCPs) or metal–organic frameworks (MOFs) is sensitive to the type and concentration of chemical species in the surrounding environment, because these materials combine the advantages of the highly regular porous structures and various luminescence mechanisms, as well as diversified host‐guest interactions. In the past few years, luminescent MOFs have attracted more and more attention for chemical sensing of gas‐phase analytes, including common gases and vapors of solids/liquids. While liquid‐phase and gas‐phase luminescence sensing by MOFs share similar mechanisms such as host‐guest electron and/or energy transfer, exiplex formation, and guest‐perturbing of excited‐state energy level and radiation pathways, via various types of host‐guest interactions, gas‐phase sensing has its unique advantages and challenges, such as easy utilization of encapsulated guest luminophores and difficulty for accurate measurement of the intensity change. This review summarizes recent progresses by using luminescent MOFs as reusable sensing materials for detection of gases and vapors of solids/liquids especially for O2, highlighting various strategies for improving the sensitivity, selectivity, stability, and accuracy, reducing the materials cost, and developing related devices.

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Section: Radical Gases (O2)mentioning

confidence: 99%

Photoluminescent Metal–Organic Frameworks for Gas Sensing

et al. 2016

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“…[96] The new Eu(III) complexes are attractive for microscopic imaging due to their very narrow emission (which leaves virtually the whole spectral region available for labels or other cellular probes) and excellent photostability (since high light intensities are typically used). Dye-doped nanoparticles are particularly suitable due to their low toxicity, protection of the indicator from undesired interferences (quenchers) by the polymeric shell and the possibility of modification of the nanoparticles surface which enables e.g.…”

Section: Oxygen-sensitive Nanoparticlesmentioning

confidence: 99%

Exceptional Oxygen Sensing Properties of New Blue Light‐Excitable Highly Luminescent Europium(III) and Gadolinium(III) Complexes

Borisov

Fischer

Saf

et al. 2014

Adv Funct Materials

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New europium(III) and gadolinium(III) complexes bearing 8-hydroxyphenalenone antenna combine efficient absorption in the blue part of the spectrum and strong emission in polymers at room temperature. The Eu(III) complexes show characteristic red luminescence whereas the Gd(III) dyes are strongly phosphorescent. The luminescence quantum yields are about 20% for the Eu(III) complexes and 50% for the Gd(III) dyes. In contrast to most state-of-the-art Eu(III) complexes the new dyes are quenched very efficiently by molecular oxygen. The luminescence decay times of the Gd(III) complexes exceed 1 ms which ensures exceptional sensitivity even in polymers of moderate oxygen permeability. These sensors are particularly suitable for trace oxygen sensing and may be good substitutes for Pd(II) porphyrins. The photophysical and sensing properties can be tuned by varying the nature of the fourth ligand. The narrow-band emission of the Eu(III) allows efficient elimination of the background light and autofluorescence and is also very attractive for use e.g. in multi-analyte sensors. The highly photostable indicators incorporated in nanoparticles are promising for imaging applications. Due to the straightforward preparation and low cost of starting materials the new dyes represent a promising alternative to the state-ofthe-art oxygen indicators particularly for such applications as e.g. food packaging.

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“…The red emitted signal is then collected by the optical probe and transmitted to a uorometer, which measures the uorescence lifetime, t. t is related to the partial pressure of oxygen by the well-known Stern-Volmer equation. 35 Fig. 2(b) shows the chamber oxygen concentration as a function of time for a range of air inlet pressures.…”

Section: Modied Stop-ow Lithographymentioning

confidence: 99%

Synthesis of colloidal microgels using oxygen-controlled flow lithography

Eral

Chen

et al. 2014

Soft Matter

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We report a synthesis approach based on stop-flow lithography (SFL) for fabricating colloidal microparticles with any arbitrary 2D-extruded shape. By modulating the degree of oxygen inhibition during synthesis, we achieved previously unattainable particle sizes. Brownian diffusion of colloidal discs in bulk suggests the out-of-plane dimension can be as small as 0.8 mm, which agrees with confocal microscopy measurements. We measured the hindered diffusion of microdiscs near a solid surface and compared our results to theoretical predictions. These colloidal particles can also flow through physiological microvascular networks formed by endothelial cells undergoing vasculogensis under minimal hydrostatic pressure ($5 mm H 2 O). This versatile platform creates future opportunities for on-chip parametric studies of particle geometry effects on particle passage properties, distribution and cellular interactions.

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Biological detection by optical oxygen sensing

Cited by 383 publications

References 322 publications

Photoluminescent Metal–Organic Frameworks for Gas Sensing

Photoluminescent Metal–Organic Frameworks for Gas Sensing

Exceptional Oxygen Sensing Properties of New Blue Light‐Excitable Highly Luminescent Europium(III) and Gadolinium(III) Complexes

Synthesis of colloidal microgels using oxygen-controlled flow lithography

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