Results 81 to 90 of about 206,275 (281)

Polarization-Maintaining Single-Frequency Fiber Laser With Quadruple Wavelengths at the C-Band

open access: yesIEEE Photonics Journal, 2018
In this paper, a polarization-maintaining quad-wavelength (QW) single-frequency fiber laser (SFFL) at the C-band with the novel and compact structure is demonstrated. Applying the rate equations and multiple coupled nonlinear Schrödinger equations,
Kunyi Li   +10 more
doaj   +1 more source

The Impact of Resonance on the Light Extraction Efficiency of Single Nanowire Ultraviolet Light Emitting Diodes

open access: yesIEEE Photonics Journal, 2020
Fabricating the nanowire ultraviolet light emitting diodes (UV LEDs) has been a promising candidate to dramatically enhance the external quantum efficiency (EQE) of UV LEDs.
Zichen Zhang, Fangliang Gao, Guoqiang Li
doaj   +1 more source

The thermodynamics of optical étendue

open access: yes, 2008
The concept of ´etendue is applied to the propagation of luminescent radiation, and to the transformation of such radiation in absorbing and luminescent media.
Markvart, T.
core   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

open access: yesAdvanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner   +4 more
wiley   +1 more source

Activatable probes for diagnosing and positioning liver injury and metastatic tumors by multispectral optoacoustic tomography

open access: yesNature Communications, 2018
Optoacoustic tomography has great potential for medical diagnosis and preclinical research. Here they develop near infrared activatable xanthene-based optoacoustic probes for diagnosing and localizing drug-induced liver injury and metastasis in mouse ...
Yinglong Wu   +5 more
doaj   +1 more source

Zigzag Hollow Cracks of Silver Nanoparticle Film Regulated by Its Drying Micro-environment

open access: yesNanoscale Research Letters, 2018
We first verify the critical impact of evaporation on the formation of zigzag hollow cracks by regulating the drying micro-environment of silver nanoparticle film.
Ruiqiang Tao   +9 more
doaj   +1 more source

Combinatorial Synthesis of Next Generation Water‐Soluble Quaternized N‐Halamine Oligomers with Long‐Lasting Antiviral Properties

open access: yesAdvanced Functional Materials, EarlyView.
A combinatorial library of dual‐functional antiviral oligomers incorporating N‐halamine and quaternary ammonium functionalities is developed for long‐lasting antiviral activity. The lead materials exhibit rapid and durable antiviral activity against SARS‐CoV‐2 variants and influenza H1N1, with 4 to 5 log reduction in viral copies at 5 mg mL−1 ...
Eid Nassar‐Marjiya   +14 more
wiley   +1 more source

Luminescent screen composition and apparatus [PDF]

open access: yes, 1970
Ultraviolet light projects photographically produced images on a screen composed of a mixture of linear and nonlinear phosphors whose spectral emissions are different.
Hilborn, E. H.
core   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

open access: yesAdvanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr   +7 more
wiley   +1 more source

Flexibility and Dynamicity Enhances and Controls Supramolecular Self‐Assembly of Zinc(II) Metallogels

open access: yesAdvanced Functional Materials, EarlyView.
Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler   +10 more
wiley   +1 more source

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