Microstructured UV-sensitive luminescent sol–gel layers

Bredol, Michael; Schem, M.

doi:10.1016/j.optmat.2004.03.017

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Applications of these films as UV sensors have been proposed. These authors also prepared strongly luminescent microstructured silica sol−gel layers doped with terbium(III) picolinate via a photolithographical process . The fact that silica sol−gel glasses doped with terbium(III) picolinate could be coated on glass fibers illustrated that coating by sol−gel materials is not restricted to flat surfaces .…”

Section: Sol−gel Hybrid Materialsmentioning

confidence: 99%

“…These authors also prepared strongly luminescent microstructured silica sol-gel layers doped with terbium(III) picolinate via a photolithographical process. 255 The fact that silica sol-gel glasses doped with terbium(III) picolinate could be coated on glass fibers illustrated that coating by sol-gel materials is not restricted to flat surfaces. 256 Circularly polarized luminescence has been observed for [Eu(dpa) 3 ] 3-, [Eu(oda) 3 ] 3-, and [Eu(bipyO 2 ) 4 ] 3+ complexes in sol-gel glasses, where dpa ) dipicolinate, oda ) oxydiacetate, and bipyO 2 ) 2,2′-bipyridine-N,N-dioxide.…”

Section: Inorganic Sol-gel Systemsmentioning

confidence: 99%

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Lanthanide-Based Luminescent Hybrid Materials

2009

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Koen Binnemans was born in Geel, Belgium, in 1970. He obtained his M. Sc. degree (1992) and Ph.D. degree (1996) in Chemistry at the Catholic University of Leuven, under the supervision of Prof. C. Go ¨rller-Walrand. In the period 1999-2005, he was a postdoctoral fellow of the Fund for Scientific Research Flanders (Belgium). He did postdoctoral work with Prof. Jacques Lucas (Rennes, France) and Prof. Duncan W. Bruce (Exeter, U.K.). In 2000, he received the first ERES Junior Award (ERES, European Rare-Earth and Actinide Society). From 2002 until 2005, he was (parttime) associate professor. Presently, he is professor of chemistry at the Catholic University of Leuven. His current research interests are metalcontaining liquid crystals (metallomesogens), lanthanide-mediated organic reactions, lanthanide spectroscopy, luminescent molecular materials, and ionic liquids.

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Section: Sol−gel Hybrid Materialsmentioning

confidence: 99%

Section: Inorganic Sol-gel Systemsmentioning

confidence: 99%

Lanthanide-Based Luminescent Hybrid Materials

2009

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“…The rather poor mechanical properties of lanthanoid complexes limit their technological applications [21,22]. One of the solutions is to introduce the lanthanoid complex into a polymer or silica-based matrix, which can be used to fabricate luminescent thin films [23][24][25][26][27][28][29][30][31]. Transparent luminescent thin films containing lanthanoid complexes have been demonstrated to be useful for application in agriculture and horticulture [32,33], lighting [34], Si-based solar cells [35] and as luminescent solar concentrators (LSCs) [21,36].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photophysical properties of a highly luminescent Eu III -containing hybrid thin film

Bouwman

2016

Polyhedron

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A luminescent thin film, Eu@glass, has been prepared on the surface of glass substrates from a silylated diamidopyridyl ligand L and the complex [Eu(dbm) 3 (H 2 O) 2 ] (Hdbm = dibenzoylmethane) via a sol-gel method. The Eu@glass exhibits intense red photoluminescence under the irradiation of near UV light with a quantum yield of 26%. Compared to the compound [Eu(dbm) 3 (H 2 O) 2 ], the photoluminescence intensity of Eu@glass is dramatically enhanced, and the emission lifetime of Eu III (0.517 ms) more than an order of magnitude longer.

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“…However, one of the major advantages of sol–gel hybrids is the high versatility of the material processing, which is compatible with microfabrication techniques and enabled their application in micro-optics , and integrated optics. − Depending on the chemical composition, the material can be either optically or thermally structured. In the first case, either standard UV lithography , or the promising two-photon lithography have already been applied with excellent results, and structures such as optical waveguides and photonic crystals were fabricated. When such functionalities are not present in the material chemical composition, optically transparent, sol–gel photonic structures can still be obtained by thermally controlled processes and other lithographic techniques such as soft lithography or nanoimprint lithography …”

Section: Introductionmentioning

confidence: 99%

One-Step Patterning of Hybrid Xerogel Materials for the Fabrication of Disposable Solid-State Light Emitters

Carregal-Romero

Llobera

Cadarso

et al. 2012

ACS Appl. Mater. Interfaces

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The one-step room-temperature micropatterning of a fluorophore-doped xerogel material on silicon oxide substrates is reported. The organo-alkoxysilane precursors and organic fluorescent dyes, as well as the polymerization experimental conditions, were tailored in order to obtain a highly homogeneous transparent material suitable for photonic applications. A thorough structural characterization was carried out by Fourier transform infrared (FT-IR) spectroscopy, (29)Si nuclear magnetic resonance ((29)Si NMR), thermogravimetric analysis (TGA), N(2) adsorption Brunauer-Emmett-Teller (BET) porosimetry, and confocal microscopy. These studies revealed a stable nonporous highly cross-linked polymer network containing evenly dispersed fluorescent molecules. Xerogel microstructures having thicknesses between 4 and 80 μm and height-to-width ratios between 0.04 and 4, as well as showing different geometries, from well arrays to waveguides, were patterned in a single step by micromolding in capillaries (MIMIC) soft lithographic technique. The reliability of the replication process was tested by bright-field optical microscopy and scanning electron microscopy (SEM) that show the close fidelity of the microstructures to the applied mold. The optical performance of the developed material was demonstrated by fabricating waveguides and evaluating their corresponding spectral response, obtaining absorption bands, at the expected excitation wavelengths of the corresponding fluorescent dyes and gain due to photonic re-emission (fluorescence) at their corresponding dye emission wavelengths. The hybrid xerogel material and the application of the simple fabrication technology presented herein can be directly applied to the development of cost-effective photonic components, as could be light emitters, to be readily integrated in single-use lab-on-chip devices and other polymeric microsystems.

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Microstructured UV-sensitive luminescent sol–gel layers

Cited by 5 publications

References 15 publications

Lanthanide-Based Luminescent Hybrid Materials

Lanthanide-Based Luminescent Hybrid Materials

Synthesis and photophysical properties of a highly luminescent Eu III -containing hybrid thin film

One-Step Patterning of Hybrid Xerogel Materials for the Fabrication of Disposable Solid-State Light Emitters

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