Electrospun Europium Complex/Polymer Composite Microfibers and Its Modified Photoluminescence Properties

2011 ◽  
Vol 688 ◽  
pp. 74-79 ◽  
Author(s):  
Hong Xing Yin ◽  
Yun Ze Long ◽  
Fang Yu ◽  
Shuai Jiang Zhao ◽  
Xi Lin She
Keyword(s):  
Optoelectronic Devices ◽  
Europium Complex ◽  
Rare Earth Complex ◽  
Photoluminescence Intensity ◽  
Photoluminescence Properties ◽  
Structural And Optical Properties ◽  
Fluorescence Spectrophotometry ◽  
Complex Polymer ◽  
Scanning Electron ◽  
The Eu

Ribbon-like microfibers of a new composite of europium complex Eu(aspirin)3(Phen) (aspirin is acetylsalicylic acid; Phen represents 1,10-phenanthroline) and polystyrene (PS) were prepared successfully by electrospinning with different mass ratios of Eu(aspirin)3(Phen) complex to PS = 1:10, 1:40 and 1:160. The microfibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and fluorescence spectrophotometry. It was found that the fibers displayed excellent photoluminescence properties compared with rare-earth complex. The photoluminescence intensity and the emission intensity of the peak at 616 nm (5D0→7F2) of Eu-ions increased with the Eu(aspirin)3(Phen) loading. No obvious fluorescence quenching was observed. Further discussion on the structural and optical properties of the microribbons was presented. This kind of materials might be expected to be applied for optical or optoelectronic devices.

Modified photoluminescence properties of rare-earth complex/polymer composite fibers prepared by electrospinning

2007 ◽  
Vol 90 (10) ◽  
pp. 103103 ◽  
Author(s):  
Hui Zhang ◽  
Hongwei Song ◽  
Hongquan Yu ◽  
Suwen Li ◽  
Xue Bai ◽  
...  
Keyword(s):  
Rare Earth ◽  
Polymer Composite ◽  
Rare Earth Complex ◽  
Composite Fibers ◽  
Photoluminescence Properties ◽  
Complex Polymer

Electrospinning Preparation and Photoluminescence Properties of Rare-Earth Complex/Polymer Composite Fibers

2007 ◽  
Vol 111 (17) ◽  
pp. 6524-6527 ◽  
Author(s):  
Hui Zhang ◽  
Hongwei Song ◽  
Hongquan Yu ◽  
Xue Bai ◽  
Suwen Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Polymer Composite ◽  
Rare Earth Complex ◽  
Composite Fibers ◽  
Photoluminescence Properties ◽  
Complex Polymer

Influence of Substrate Etching on Structural and Optical Properties of ZnO Nanorods Grown by Hydrothermal Method

2012 ◽  
Vol 460 ◽  
pp. 147-150
Author(s):  
Qiu Ming Fu ◽  
Jian Peng Wu ◽  
Zhi Bin Ma ◽  
Ya Fang Tu
Keyword(s):  
Hydrothermal Method ◽  
Photoluminescence Spectrum ◽  
Zno Nanorods ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Morphology And Structure ◽  
Influence Of Substrate ◽  
Scanning Electron

ZnO nanostructures were prepared on Si and AlN substrates with and without etching by hydrothermal method. The influences of substrate etching on the morphology and structure were investigated by scanning electron microscopy, X-ray diffraction, Raman microscopy, and photoluminescence spectrum. The results show that the morphology and the photoluminescence properties of ZnO nanorods are significantly influenced by substrate etching.

Influences of Reaction Conditions on the Morphology and Properties of CaWO4 Films Prepared by Anodization

2014 ◽  
Vol 809-810 ◽  
pp. 654-659
Author(s):  
Jian Ling Zhao ◽  
Yong Liao ◽  
Li Ye Zhao ◽  
Xiao Jing Yang ◽  
Wei Yu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Photoluminescence Intensity ◽  
Constant Voltage ◽  
Photoluminescence Properties ◽  
Reaction Conditions ◽  
X Ray ◽  
Anodization Method ◽  
Scanning Electron

CaWO4 films were prepared in saturated Ca(OH)2 solution through constant-voltage anodization method. Influences of reaction time, voltage and temperature on the morphology, crystal structure and photoluminescence properties were studied through scanning electron microscopy (SEM), X-ray diffractometer (XRD) and photoluminescence measurements (PL). Results show that the as-prepared CaWO4 film is of tetragonal phase, the reaction conditions affect the morphology, grain size and photoluminescence properties greatly. The CaWO4 film anodized at 20V, 45°C for 40 min is flat, uniform and dense with stronger photoluminescence intensity. The formation process of CaWO4 films has also been discussed.

Effects of Gamma Irradiation on Optical Properties of Colloidal Nanocrystals

2007 ◽  
Vol 1038 ◽  
Author(s):  
Nathan J Withers ◽  
Krishnaprasad Sankar ◽  
Brian A. Akins ◽  
Tosifa A. Memon ◽  
Jiangjiang Gu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Gamma Irradiation ◽  
Irradiation Dose ◽  
Nanocrystalline Material ◽  
Light Output ◽  
Colloidal Nanocrystals ◽  
Photoluminescence Intensity ◽  
Photoluminescence Properties ◽  
Material Systems ◽  
Dose Radiation

AbstractThe effects of 137Cs gamma irradiation on photoluminescence properties, such as spectra, light output, and lifetime, of several types of colloidal nanocrystals have been investigated. Irradiation-induced damage testing was performed on CdSe/ZnS, LaF3:Eu, LaF3:Ce, ZnO, and PbI2 nanocrystals synthesized on a Schlenk line using appropriate solvents and precursors. Optical degradation of the nanocrystals was evaluated based on the measured dependence of their photoluminescence intensity on the irradiation dose. Radiation hardness varies significantly between various nanocrystalline material systems.

Correlation of Electrical, Structural, and Optical Properties of Erbium In Silicon

1993 ◽  
Vol 301 ◽  
Author(s):  
J. L. Benton ◽  
D. J. Eaglesham ◽  
M. Almonte ◽  
P. H. Citrin ◽  
M. A. Marcus ◽  
...  
Keyword(s):  
Root Function ◽  
Free Exciton ◽  
Excitation Power ◽  
Optically Active ◽  
Photoluminescence Intensity ◽  
Square Root ◽  
Structural And Optical Properties ◽  
X Ray ◽  
X Ray Absorption ◽  
Donor Activity

ABSTRACTAn understanding of the electrical, structural, and optical properites of Er in Si is necessary to evaluate this system as an opto-electronic material. Extended x-ray absorption fine structure, EXAFS, measurements of Er-implanted Si show that the optically active impurity complex is Er surrounded by an O cage of 6 atoms. The Er photoluminescence intensity is a square root function of excitation power, while the free exciton intensity increases linearly. The square root dependence of the 1.54μm-intensity is independent of measurement temperature and independent of co-implanted species. Ion-implantation of Er in Si introduces donor activity, but spreading resistance carrier concentration profiles indicate that these donors do not effect the optical activity of the Er.

scholarly journals Structural and optical properties of SnO2–Al2O3 nanocomposite synthesized via sol-gel route

2015 ◽  
Vol 33 (4) ◽  
pp. 714-718 ◽  
Author(s):  
Neeraj K. Mishra ◽  
Chaitnaya Kumar ◽  
Amit Kumar ◽  
Manish Kumar ◽  
Pratibha Chaudhary ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Properties ◽  
Sol Gel ◽  
Physical Interaction ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Sensing Applications ◽  
Scanning Electron

AbstractA nanocomposite of 0.5SnO2–0.5Al2O3 has been synthesized using a sol-gel route. Structural and optical properties of the nanocomposite have been discussed in detail. Powder X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray diffraction spectroscopy confirm the phase purity and the particle size of the 0.5SnO2–0.5Al2O3 nanocomposite (13 to 15 nm). The scanning electron microscopy also confirms the porosity in the sample, useful in sensing applications. The FT-IR analysis confirms the presence of physical interaction between SnO2 and Al2O3 due to the slight shifting and broadening of characteristic bands. The UV-Vis analysis confirms the semiconducting nature because of direct transition of electrons into the 0.5SnO2–0.5Al2O3 nanocomposites.

Synthesis and Study the Properties of a Solar Cell of Gold Nanoparticles Prepared in a Simple Chemical Way

2021 ◽  
Vol 19 (11) ◽  
pp. 66-71
Author(s):  
Maithm A. Obaid ◽  
Suha A Fadaam ◽  
Osama S. Hashim
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Chemical Method ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Casting Method ◽  
X Ray ◽  
Transmission Electron ◽  
Simple Chemical ◽  
Scanning Electron

The aim of this study is to prepare gold nanoparticles by a simple chemical method at a temperature of 70°C. The solution was dried on glass basest by Casting method, the rate of five drops per sample At a temperature 100 C. Then the structural and optical properties have been confirmed by X-ray diffraction, scanning electron microscopy (SEM) and Transmission Electron microscope (TEM), Fourier Transform Infrared Spectroscopy (FTIR) and spectrum.

scholarly journals Investigations of M3Al8O15:Eu3+,Dy3+ (M = Ba, Ca, Mg) phosphors

2016 ◽  
Vol 34 (2) ◽  
pp. 412-417
Author(s):  
Esra Öztürk
Keyword(s):  
Electron Microscopy ◽  
Solid State Reaction Method ◽  
Morphological Characterization ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Three Samples ◽  
Scanning Electron ◽  
The Eu

AbstractIn this work, aluminate type phosphorescence materials were synthesized via the solid state reaction method and the photoluminescence (PL) properties, including excitation and emission bands, were investigated considering the effect of trace amounts of activator (Eu3+) and co-activator (Dy3+). The estimated thermal behavior of the samples at certain temperatures (> 1000 °C) during heat treatment was characterized by differential thermal analysis (DTA) and thermogravimetry (TG). The possible phase formation was characterized by X-ray diffraction (XRD). The morphological characterization of the samples was performed by scanning electron microscopy (SEM). The PL analysis of three samples showed maximum emission bands at around 610 nm, and additionally near 589 nm, 648 nm and 695 nm. The bands were attributed to typical transitions of the Eu3+ ions.

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