Structural, optical and X-ray attenuation properties of Tb3+:BaxCe1−xF3−x (x = 0.18–0.48) nanospheres synthesized in polyol medium

2018 ◽  
Vol 47 (25) ◽  
pp. 8382-8391
Author(s):  
Daniel González-Mancebo ◽  
Ana Isabel Becerro ◽  
Cécile Genevois ◽  
Mathieu Allix ◽  
Ariadna Corral ◽  
...  
Keyword(s):  
Colloidal Suspensions ◽  
Green Emission ◽  
X Ray ◽  
Polyol Medium ◽  
Uv Excitation

Uniform Tb3+:BaxCe1−xF3−x nanospheres obtained in polyol medium form colloidal suspensions in water and show an intense green emission under UV excitation and excellent X-ray attenuation properties.

Synthesis and Characterization of Water-Soluble Cu2+-Doped ZnSe Quantum Dots

2009 ◽  
Vol 79-82 ◽  
pp. 2043-2046 ◽  
Author(s):  
Shan Shan Li ◽  
Fu Tian Liu ◽  
Qun Wang ◽  
Xiu Xiu Chen ◽  
Ping Yang
Keyword(s):  
Quantum Dots ◽  
Green Emission ◽  
Average Diameter ◽  
Water Soluble ◽  
X Ray ◽  
Zinc Blende ◽  
Transmission Electron ◽  
Uv Excitation ◽  
Zinc Blende Structure

Cu2+-doped ZnSe quantum dots (ZnSe:Cu) were prepared via a green and simple route, namely the chemical coprecipitation method. Under 365 nm UV excitation, green emission is observed. X-ray powder diffraction (XRD) shows that ZnSe:Cu nanoparticle is cubic zinc blende structure; the transmission electron microscopy (TEM) exhibits that the average diameter of ZnSe:Cu nanocrystals is less than 10 nm. UV-vis spectrophotometer and fluorescence spectrophotometer indicate that ZnSe:Cu nanocrystals have good fluorescence effects.

Growth Kinetics of Quantum Size ZnO Particles

1998 ◽  
Vol 536 ◽  
Author(s):  
E. M. Wong ◽  
J. E. Bonevich ◽  
P. C. Searson
Keyword(s):  
Growth Kinetics ◽  
Ostwald Ripening ◽  
Chemical Potential ◽  
Colloidal Suspensions ◽  
Green Emission ◽  
Blue Shift ◽  
Constant Current ◽  
Mass Model ◽  
Zno Particles ◽  
Kinetics Of

AbstractColloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. The particle aging kinetics were determined by monitoring the optical band edge absorption and using the effective mass model to approximate the particle size as a function of time. We show that the growth kinetics of the ZnO particles follow the Lifshitz, Slyozov, Wagner theory for Ostwald ripening. In this model, the higher curvature and hence chemical potential of smaller particles provides a driving force for dissolution. The larger particles continue to grow by diffusion limited transport of species dissolved in solution. Thin films were fabricated by constant current electrophoretic deposition (EPD) of the ZnO quantum particles from these colloidal suspensions. All the films exhibited a blue shift relative to the characteristic green emission associated with bulk ZnO. The optical characteristics of the particles in the colloidal suspensions were found to translate to the films.

Dazzling green emission from graphene oxide nanosheet-embedded co-doped Ce3+ and Tb3+:PVA polymer nanocomposites for photonic applications

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54525-54538 ◽  
Author(s):  
K. Naveen Kumar ◽  
R. Padma ◽  
J. L. Rao ◽  
Misook Kang
Keyword(s):  
Graphene Oxide ◽  
Energy Transfer ◽  
Polymer Nanocomposites ◽  
Green Emission ◽  
Graphene Oxide Nanosheet ◽  
Uv Excitation ◽  
Co Doped

Novel dazzling green emission has been obtained from graphene oxide nanosheet-embedded Ce3+ and Tb3+:PVA polymer nanocomposites under UV excitation. The green emission of Tb3+ is enhanced by an energy transfer from Ce3+ to Tb3+ and GO NS to Tb3+.

scholarly journals Connecting structure, dynamics and viscosity in sheared soft colloidal liquids: a medley of anisotropic fluctuations

Soft Matter ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 171-180 ◽  
Author(s):  
Fabian Westermeier ◽  
David Pennicard ◽  
Helmut Hirsemann ◽  
Ulrich H. Wagner ◽  
Christoph Rau ◽  
...  
Keyword(s):  
Viscoelastic Behavior ◽  
Colloidal Suspensions ◽  
X Ray ◽  
Structure Dynamics ◽  
Colloidal Liquids ◽  
Transient Structure

Simultaneous coherent X-ray and rheology experiments provide access to the transient structure, dynamics and viscoelastic behavior in repulsive colloidal suspensions.

scholarly journals PREPARATION OF NICKEL NANOWIRES AND EFFECTS OF SYNTHESIS CONDITIONS ON THEIR MORPHOLOGY

2019 ◽  
Vol 57 (3A) ◽  
pp. 21
Author(s):  
Minh Truong Xuan Nguyen ◽  
Thu Thi Minh Bui ◽  
Cuc Thi Le ◽  
Linh Huu Nguyen ◽  
Y Ngoc Pham ◽  
...  
Keyword(s):  
Synthesis Process ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
Synthesis Conditions ◽  
Nickel Nanowires ◽  
Transmission Electron ◽  
Experimental Parameters ◽  
Polyol Medium ◽  
Nickel Nanostructures

Nickel nanostructures prepared by various methods have received considerable attentions due to their numerous applications. In this study, one-dimensional nickel nanowires (NiNWs) were synthesized by the reduction of nickel (II) chloride in polyol medium. Poly (vinylpyrrolidone) (PVP) served as the surfactant and hydrazine hydrate was used as the reductant. The effects of different experimental parameters, i.e. concentration of Ni2+, volume of N2H4, concentration of PVP and reaction temperature on the formation and morphology of NiNWs were studied. The structure, composition and surface morphology of the materials were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the morphology as well as the diameter of NiNWs could be effectively controlled by adjusting parameters of the synthesis process.

scholarly journals Super Long Green Persistent Luminescence from X-Ray Excited β-NaYF4: Tb3+

2019 ◽  
Author(s):  
Yue Hu ◽  
Yanmin Yang ◽  
Xiaoxiao Li ◽  
Xin Wang ◽  
Yunqian Li ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Light Source ◽  
Green Emission ◽  
Persistent Luminescence ◽  
Tunneling Model ◽  
X Ray ◽  
Long Afterglow ◽  
Photo Stability ◽  
F Centers

Here, we have discovered a X-ray excited long afterglow phosphor β-NaYF4: Tb3+. After the irradiation of X-ray, the green emission can persist for more than 240 h. After 36 h, the afterglow intensity arrived at 0.69 mcd•m-2, which can clearly be observed by naked eyes. Even after 84 h, the afterglow emission brightness still reached 0.087 mcd•m-2. Also, combined with the results of thermoluminescence and photoluminescence, the super long afterglow emission of β-NaYF4: Tb3+ can be ascribed to the tunneling model associated with F centers. More importantly, the super long green afterglow emission of β-NaYF4: Tb3+ has been successfully used as in vivo light source to activate g-C3N4 for photodynamic therapy（PDT）and bacteria destruction. Furthermore, super long persistent luminescence of β-NaYF4: Tb3+ could be repeatedly charged by X-ray for many circulations, which indicates that the phosphors have high photo stability under repeated cycles of alternating X-ray irradiation.

scholarly journals Люминофоры холодного голубого излучения на основе оксида алюминия, допированного диспрозием

2022 ◽  
Vol 64 (1) ◽  
pp. 95
Author(s):  
И.В. Бакланова ◽  
В.Н. Красильников ◽  
А.П. Тютюнник ◽  
Я.В. Бакланова
Keyword(s):  
Crystal Structure ◽  
Phase Composition ◽  
Diffraction Analysis ◽  
Powder Diffraction ◽  
Thermal Quenching ◽  
Emission Spectra ◽  
X Ray ◽  
White Emission ◽  
Uv Excitation ◽  
Quenching Of Luminescence

Al2О3:Dy3+ oxides with different colors luminescence were synthesized using precursor technology. The phase composition and crystal structure of the obtained materials were established by X-ray powder diffraction analysis. The excitation and emission spectra, decay curves, thermal quenching of luminescence were studied. Under UV excitation, the phosphors exhibit blue, purplish blue, white emission depending on the concentration of dysprosium and the temperature of annealing of the Al1-xDyx(OH)(HCOO)2 precursor in air.

scholarly journals Optical and X-ray scattering studies of the electric field-induced orientational order in colloidal suspensions of pigment nanorods

2018 ◽  
Vol 267 ◽  
pp. 286-296 ◽  
Author(s):  
Oleksandr Buluy ◽  
Natalie Aryasova ◽  
Oleksandr Tereshchenko ◽  
Yuriy Kurioz ◽  
Vassili Nazarenko ◽  
...  
Keyword(s):  
Electric Field ◽  
Orientational Order ◽  
Colloidal Suspensions ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Azine based smart probe for optical recognition and enrichment of Mo(vi )

2018 ◽  
Vol 47 (32) ◽  
pp. 11084-11090 ◽  
Author(s):  
Milan Ghosh ◽  
Sabyasachi Ta ◽  
Jesús Sanmartín Matalobos ◽  
Debasis Das
Keyword(s):  
Aqueous Solution ◽  
Single Crystal ◽  
Green Emission ◽  
Selective Detection ◽  
X Ray ◽  
Optical Recognition

Single crystal X-ray structurally characterized azine derivative (L) was explored for selective detection of Molybdenum (Mo(vi)) cation through green emission. The L was very efficient for enrichment of Mo(vi) from aqueous solution.

scholarly journals Particle-scale structure in frozen colloidal suspensions from small-angle x-ray scattering

2011 ◽  
Vol 83 (2) ◽  
Author(s):  
Melissa Spannuth ◽  
S. G. J. Mochrie ◽  
S. S. L. Peppin ◽  
J. S. Wettlaufer
Keyword(s):  
Small Angle ◽  
Colloidal Suspensions ◽  
Scale Structure ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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