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Добірка наукової літератури з теми "Luminescent property"

Автор: Grafiati
Опубліковано: 13 квітня 2024

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Статті в журналах з теми "Luminescent property"

1

Seymour, Linda M., Marco Nicola, Max I. Kessler, et al. "On the production of ancient Egyptian blue: Multi-modal characterization and micron-scale luminescence mapping." PLOS ONE 15, no. 11 (2020): e0242549. http://dx.doi.org/10.1371/journal.pone.0242549.

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Анотація:
The ancient pigment Egyptian blue has long been studied for its historical significance; however, recent work has shown that its unique visible induced luminescent property can be used both to identify the pigment and to inspire new materials with this characteristic. In this study, a multi-modal characterization approach is used to explore variations in ancient production of Egyptian blue from shabti statuettes found in the village of Deir el-Medina in Egypt (Luxor, West Bank) dating back to the New Kingdom (18th-20th Dynasties; about 1550–1077 BCE). Using quantitative SEM-EDS analysis, we identify two possible production groups of the Egyptian blue and demonstrate the presence of multiple phases within samples using cluster analysis and ternary diagram representations. Using both macro-scale non-invasive (X-rays fluorescence and multi-spectral imaging) and micro-sampling (SEM-EDS and Raman confocal microspectroscopy) techniques, we correlate photoluminescence and chemical composition of the ancient samples. We introduce Raman spectroscopic imaging as a means to capture simultaneously visible-induced luminesce and crystal structure and utilize it to identify two classes of luminescing and non-luminescing silicate phases in the pigment that may be connected to production technologies. The results presented here provide a new framework through which Egyptian blue can be studied and inform the design of new materials based on its luminescent property.
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2

Tao, Lei, Kai Lan, Cheng-Long Zhong, et al. "Wavelength-tunable linearly polarized luminescence film constructed using a highly efficient luminescent liquid crystal with stimuli-responsive property." Journal of Materials Chemistry C 8, no. 46 (2020): 16561–68. http://dx.doi.org/10.1039/d0tc04406g.

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3

Fan, Jung Chuan, Huang Huei Sung, and Chun Rong Lin. "The Anomalous Photoluminescence and Thermally Stimulated Luminescence from Carbon Nanotubes." Materials Science Forum 700 (September 2011): 116–19. http://dx.doi.org/10.4028/www.scientific.net/msf.700.116.

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Анотація:
The semiconducting property of carbon nanotubes have been investigated by the luminescence measurement. The morphology of carbon nanotubes has been detected by the scanning electric microscope, and the X ray diffraction determines the atomic structure of carbon nanotubes. The carbon nanotubes can be luminescence under laser irradiation. Using the photoluminescence measurement, the emitting spectrum of carbon naotubes is very spread in a near-red emission range and a main peak at 1.3 eV . The temperature dependent of photoluminescence effect indicates that the semiconducting property of carbon nanotubes is very clearly. According to the thermally photoluminescence experiment, the luminescent property of carbon nanotubes is due to the center of energy trap of defect. It is suggested that the luminescence of the semiconducting property result is dominated by the electron trap of defect in the carbon nanotubes system.
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4

Shi, Weiwei, Lei Liang, Jinping Zhang, et al. "A Versatile Luminescent Ga-Organic Framework with Multi-Emission Centers as a Blue LED and Fluorescent Probe for Low-Temperature Detection and Selective Fe3+ Sensing." Nanomaterials 12, no. 22 (2022): 4009. http://dx.doi.org/10.3390/nano12224009.

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Анотація:
The development and utilization of 3p-block based MOFs as fluorescent materials has attracted significant attention in recent years. Herein, we have successfully constructed a versatile luminescent Ga-MOF (SNNU-63) with a 3d10 configuration and a large ligand twist configuration. Interestingly, the as-synthesized Ga-MOF exhibits excellent luminescence property and a good material for blue light-emitting diode (LED). At 80 K, this Ga-MOF shows multi-emission centers at 381, 462, and 494 nm. As a ratiometric thermometer, this Ga-MOF exhibits an excellent temperature sensing property with high relative sensitivity (Sm = 2.60 % K−1 at 110 K). The fluorescence intensity ratio I381/I494 shows a very good fit for the Boltzmann results (80–240 K). Moreover, the luminescent Ga-MOF exhibits an excellent selective detection of Fe3+ over other metal ions in aqueous an medium, and the limit of detection (LOD) towards Fe3+ ions is calculated to be 1.227 × 10−4 M. This work presents a versatile luminescent Ga-MOF material as a blue LED and fluorescent probe for low-temperature and selective Fe3+ sensing.
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5

Song, Ya, Guo Gong, Jingjing Du, et al. "Synthesis and Inkjet Printing of NaYF4:Ln3+@NaYF4 Core–Shell Nanoparticles with Enhanced Upconversion Fluorescence for Anti-Counterfeiting Applications." Journal of Nanoscience and Nanotechnology 20, no. 3 (2020): 1511–19. http://dx.doi.org/10.1166/jnn.2020.17353.

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Анотація:
Recently, lanthanide-doped upconversion luminescent materials have showed great potential in optical data storage, information encryption and anti-counterfeiting. However, the low upconversion luminescence still limited their applications. In this work, we fabricated RGB NaYF4:Ln3+@NaYF4 core–shell nanoparticles (CSNPs) with enhanced upconversion luminescence by coating an inert NaYF4 shell onto NaYF4:Ln3+ core nanoparticles via thermal decomposition method. The effect of increased shell temperature and addition of shell precursors on crystal phase, morphology and luminescent property of the synthesized CSNPs were systematically investigated. It was demonstrated that high shell growing temperature facilitated the formation of pure β-NaYF4 CSNPs. Upon increasing amount of shell precursors, the morphologies of hexagonal phase NaYF4 CSNPs changed from nanorod to nanocube and showed different luminescent properties. Pure hexagonal phase NaYF4 CSNPs with highest upconversion luminescence of about 15 times higher than NaYF4:Ln3+ core nanoparticles can be prepared at 310 °C with the addition of shell precursors at 3 mmol. Moreover, three-primary-color (RGB) CSNPs with enhanced upconversion luminescence were successfully prepared by changing the doping pair of lanthanide ions in core. The synthesized RGB CSNPs were fabricated into environment friendly luminescent ink by sequential surface modification by PAA ligand and dispersing in mixture solvent of ethanol, water and glycerol. Comparative results showed that the fluorescence enhanced RGB CSNPs inks were more suitable for inkjet printing of multicolored, complex and high resolution luminescent anti-counterfeiting patterns on paper substrates.
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6

Saotome, Satoru, Kazumasa Suenaga, Kazuo Tanaka, and Yoshiki Chujo. "Design for multi-step mechanochromic luminescence property by enhancement of environmental sensitivity in a solid-state emissive boron complex." Materials Chemistry Frontiers 4, no. 6 (2020): 1781–88. http://dx.doi.org/10.1039/c9qm00719a.

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Анотація:
The solid-state emissive boron complex with multi-step mechanochromic luminescence was designed. The crystalline sample showed gradual changes in luminescent color triggered by scratching. The design concept is illustrated.
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7

HAO, WEICHANG, HAIBIN FEN, JUNYING ZHANG, and TIANMIN WANG. "LUMINESCENT PROPERTY OF ZNO GRANULAR FILMS WITH DIFFERENT PARTICLE SIZE." International Journal of Modern Physics B 24, no. 15n16 (2010): 2827–32. http://dx.doi.org/10.1142/s0217979210065702.

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Анотація:
Zinc oxide has received extensive attention for its unique luminescence properties. In this paper, ZnO granular films were prepared on the Si wafer and quartz substrate by Layer-by-Layer electrostatic self-assembly method. The effect of sol concentration on particle size and photoluminescence properties was investigated. SEM images indicate that ZnO particle size increases with sol concentration improving. Absorption edge and photoluminescence peak have a red-shift with particle size increase. The emission peak shift is resulted from particle size effect and the change of oxygen vacancy concentration in surface. The luminescent property of granular film shows big difference with that of ZnO sol. This difference is related to the assembly state of ZnO nanoparticles.
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8

Hasegawa, Takuya, Kenji Toda, Tadashi Ishigaki, et al. "Luminescence of Phosphor Balls Prepared Using Melt Quenching Synthesis Method." Materials Science Forum 883 (January 2017): 17–21. http://dx.doi.org/10.4028/www.scientific.net/msf.883.17.

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Анотація:
Well-grown M3MgSi2O8(M = Ca, Sr and Ba):Eu2+ phosphors were synthesized by novel melt quenching synthesis method. The luminescence property of the Sr3MgSi2O8:Eu2+ phosphor synthesized by the melt synthesis method is comparable to those of the sample synthesized by a conventional solid state reaction. Sintered phosphor balls with excellent luminescent characteristics were obtained.
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9

Li, Zeren. "The Luminescent Property of Magnetic Polymers and Its Influencing Factors." E3S Web of Conferences 213 (2020): 02011. http://dx.doi.org/10.1051/e3sconf/202021302011.

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Анотація:
In this paper, the generation mechanism, influencing factors and application of the luminescent properties of magnetic polymers are reviewed. In practical applications, magnetic polymers exhibit a variety of unique luminescent properties, including photoluminescence, electroluminescence and thermoluminescence. There are many factors affecting the luminescent properties of different kinds of magnetic polymers, including the types of magnetic centers, the properties of metal ions, the charge transfer between metal ions and ligands, and the influence of functional groups on the main and side chains of the polymers. This paper explains the luminescent properties of magnetic polymers from the aspects of generation mechanism and influencing factors.
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10

Xu, Chao Nan, C. Li, Y. Imai, H. Yamada, Y. Adachi, and K. Nishikubo. "Development of Elastico-Luminescent Nanoparticles and their Applications." Advances in Science and Technology 45 (October 2006): 939–44. http://dx.doi.org/10.4028/www.scientific.net/ast.45.939.

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Анотація:
Recently we have proposed that stress distribution of a subject can be visualized by utilizing a novel mechanoluminescence phenomenon that can give intense visible light emission by application of mechanical stress. As the luminescence intensity is proportional to the time-variation of strain energy in the elastic region, we call it elastico-luminescence. In order to realize a high space resolution in such visualization for stress distribution, we aim to develop strong elastico-luminescent nanoparticles, such as a controlled structure of α-SrAl2O4:Eu (monoclinic phase). The processing of the nanoparticles, the property and the applications will be reported in the present work.
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