Synthesis and luminescent properties of monodisperse SiO
                2
            @SiO2:Eu(DBM)3phen microspheres with core-shell structure by sol–gel method

Mou, Yongren; Kang, Ming; Wang, Feng; Chen, Kexu; Sun, Rong

doi:10.1007/s10971-017-4424-x

Cited by 16 publications

(6 citation statements)

References 38 publications

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“…Figure 5 shows the emission spectra of CSF-CaCO 3 with the Eu(DBM) 3 phen dopant concentration of 1–7 mol%, respectively. Due to the quenching effect of the RE complex doping concentration, 29,33 the CSF-CaCO 3 has the strongest luminous intensity when the doping concentration is 5 mol%. The above data prove that the surface layer of CSF-CaCO 3 is successfully and uniformly doped by Eu(DBM) 3 phen, and has a wide (220 nm–420 nm) excitation band, which lays a foundation for visualizing the spatial dispersion states of fillers in composite materials.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of fluorescent calcium carbonate and visualization of its dispersion states in polypropylene

Kang

Chen

et al. 2019

Journal of Composite Materials

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The dispersion states of fillers in the polymer matrix is an important factor to determine the properties of the polymer composites. Mastering the dispersion structure of inorganic minerals such as calcium carbonate in the polymer matrix is of great significance for the design of high performant polymer composites. Currently, due to the limitations of conventional electron microscope imaging capabilities, it is difficult to understand the internal dispersion structure of fillers in polymer composites comprehensively, regionally and stereoscopically. Here, we successfully embed the rare earth complex into the silica of the calcium carbonate surface to realize the fluorescent labeling of the calcium carbonate fillers. The fluorescent calcium carbonate exhibited broad excitation band ranging from 220 nm to 440 nm and showed bright red under ultraviolet light (365 nm). The two-dimensional dispersion states of the fillers at different depths in the polymer composite were obtained by the fluorescent imaging ability of laser scanning confocal microscope; these two-dimensional confocal images were further three-dimensionally reconstructed through Avizo Fire VSG software, and the spatial distribution of fillers in polymer composite was obtained without damage. This characterization method provides a new noninvasive method for studying the dispersion structure of fillers in polymers.

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Section: Resultsmentioning

confidence: 99%

“…RE complex (Eu(DBM) 3 phen) was synthesized according to the reported method. 28,29 The CSF-CaCO 3 was obtained by the following experimental procedures. Firstly, spherical CaCO 3 was prepared according to the template method.…”

Section: Methodsmentioning

confidence: 99%

Preparation of fluorescent calcium carbonate and visualization of its dispersion states in polypropylene

Kang

Chen

et al. 2019

Journal of Composite Materials

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“…24 The mono-disperse SiO 2 @SiO 2 :Eu(DBM) 3 phen phosphors were synthesized in a seeded growth way, which our group had prepared successfully as following steps. 25 The formation process for the SiO 2 @SiO 2 :Eu(DBM) 3 phen phosphors was shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

Visualization of filler network in silicone rubber with confocal laser-scanning microscopy

et al. 2017

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Most of the present studies of filler network structure basically stay in some phenomenological descriptions and classical electron microscopes are restricted by conventional 2-D imaging. This paper completed the visualization of filler networks in silica-reinforced silicone rubber (MVQ). Using a special network visualization technique based on fluorescent markers embedded in silica and Confocal Laser-Scanning Microscopy with an optical lateral resolution of about 200 nm, insights into the precise 3-D morphology and detailed micro-structure of filler networks were gained. A kind of sensitized-silica phosphor was prepared, with the excitation wavelength of 405 nm, which is consistent with the laser wavelength of Confocal Laser-Scanning Microscopy. Combining Image J software and tensile measurements, shapes, network structures, size distributions of aggregates in the silicone rubber matrix with silica loading from 10 to 60 phr were directly observed and the loading threshold for the formation of filler network in this experiment was obtained.

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“…Compared with the rare‐earth ions (RE 3+ )‐doped monofunctional phosphors, the luminescence materials with rich functionalities can generate new interesting effects and are more applicable in the advanced scientific application fields, such as intelligent sensing, 1 life science, 2 biomedicine, 3,4 and energy and environmental engineering 5,6 . For instance, Pan et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of Gd³⁺ substitution on the structure, photoluminescence, scintillation, and thermometric features of Pr³⁺:Lu₂Zr₂O₇ phosphors

et al. 2023

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In this study, it is shown how the photoluminescence, scintillation, and optical thermometric properties are managed via the introduction of Gd3+ ions into Pr3+:Lu2Zr2O7. Raman spectra validate that partial replacement of Lu3+ with Gd3+ can promote the phase transition of Lu2Zr2O7 host from the defective fluorite structure to the ordered pyrochlore one. Upon 289 nm excitation, all the samples emit the 483 (3P0 → 3H4), 581 (1D2 → 3H4), 611 (3P0 → 3H6), 636 (3P0 → 3F2), and 714 nm (3P0 → 3F4) emissions from Pr3+ ions, which are enhanced with the addition of Gd3+ ions due to the modification of crystal structure. Dissimilarly, the X‐ray excited luminescence spectra consist of a strong emission located at 314 nm from Gd3+ ions (6P7/2 → 8S7/2), together with the typical emissions from Pr3+ ions, which exhibit different dependences on the Gd3+ concentration. When the luminescence intensity ratio between the 3P0 → 3H6 (611 nm) and 1D2 → 3H4 (581 nm) transitions is selected for temperature sensing, Pr3+:(Lu0.75Gd0.25)2Zr2O7 shows the optimal relative sensing sensitivity of 0.78% K−1 at 303 K, which is higher than that of the Gd3+‐free sample. Therefore, the developed Pr3+:(Lu, Gd)2Zr2O7 phosphors have the applicative potential for optical thermometry, X‐ray detection, and photodynamic therapy.

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Synthesis and luminescent properties of monodisperse SiO 2 @SiO2:Eu(DBM)3phen microspheres with core-shell structure by sol–gel method

Cited by 16 publications

References 38 publications

Preparation of fluorescent calcium carbonate and visualization of its dispersion states in polypropylene

Preparation of fluorescent calcium carbonate and visualization of its dispersion states in polypropylene

Visualization of filler network in silicone rubber with confocal laser-scanning microscopy

Effects of Gd³⁺ substitution on the structure, photoluminescence, scintillation, and thermometric features of Pr³⁺:Lu₂Zr₂O₇ phosphors

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Synthesis and luminescent properties of monodisperse SiO 2 @SiO2:Eu(DBM)3phen microspheres with core-shell structure by sol–gel method

Cited by 16 publications

References 38 publications

Preparation of fluorescent calcium carbonate and visualization of its dispersion states in polypropylene

Preparation of fluorescent calcium carbonate and visualization of its dispersion states in polypropylene

Visualization of filler network in silicone rubber with confocal laser-scanning microscopy

Effects of Gd3+ substitution on the structure, photoluminescence, scintillation, and thermometric features of Pr3+:Lu2Zr2O7 phosphors

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Product

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Effects of Gd³⁺ substitution on the structure, photoluminescence, scintillation, and thermometric features of Pr³⁺:Lu₂Zr₂O₇ phosphors