Dosimeter Based on YAG: Ce Phosphor via Sol-Gel Method for Online X-ray Radiation Monitoring

This paper focuses on the preparation of cerium-doped yttrium aluminum garnet (YAG: Ce) powder with several concentration gradients via the sol-gel method by detecting its structural characteristics via X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) to verify the generation of a complete crystal phase and evenly distributed nanopowder. On this basis, the luminescence characteristics of Ce3+ are explored, the mechanism and model are discussed based on the spectra, and the ideal doping concentration was obtained by comparing the luminescence intensity along with the fluorescence quenching theory and fluorescence decay spectra of samples with different doping concentrations. Several radiation dosimeters based on YAG: Ce phosphors were made; the online radiation monitoring function was realized under the exposure of a standard X-ray source; the repeatability, accuracy, and sensitivity of the system were verified by experiments; and the factors affecting dosimeter response are discussed. This paper verifies the possibility of adhibiting YAG: Ce fluorescent powder for online X-ray monitoring, and lays the foundation for further research.

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Structural and Surface Morphology Studies of La0.67Ba0.33(Mn1−xAlx)O3Thin Films Prepared by Sol-Gel Method

Journal of Nanomaterials ◽

10.1155/2013/412741 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

H. Abdullah ◽

M. S. Zulfakar

Keyword(s):

Thin Films ◽

Surface Morphology ◽

Sol Gel ◽

Rhombohedral Structure ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Xrd Patterns ◽

Nanocrystalline Thin Films ◽

Prominent Peak

Nanocrystalline thin films of La0.67Ba0.33(Mn1−xAlx)O3(x=0.00,0.05,0.10, and 0.15) were prepared by sol-gel method, as a starter material consisting of La2O3, BaNO3, Mn(NO3), and Al(NO3). The molarities of La2O3and BaNO3are constant, while molarities of Mn(NO3) and Al(NO3) were calculated based on stoichiometric theory. Thin films were deposited on quartz glass substrate by using spin coating technique and sintered at 700°C. X-ray diffractometer (XRD) patterns showed that these thin films consist of pure La0.67Ba0.33(Mn1−xAlx)O3phase where the most prominent peak is observed at (104). All the samples display a rhombohedral structure. Scanning electron microscopy (SEM) showed that aggregation of small particles occurred more in doped films than in undoped films. The surface morphology has been studied by using AFM, and the roughness of thin films was analyzed.

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ZnO Nano-microstructures and their Photo Conducting Properties Synthesized by Sol-Gel Method

SAMRIDDHI A Journal of Physical Sciences Engineering and Technology ◽

10.18090/samriddhi.v10i02.3 ◽

2018 ◽

Vol 10 (02) ◽

pp. 95-98

Author(s):

Sheo K. Mishra ◽

U. K. Tripathi ◽

Saurabh Dixit ◽

K. C. Dubey ◽

R. K. Shukla

Keyword(s):

Hexagonal Phase ◽

Sol Gel ◽

Zno Nanostructures ◽

X Ray Diffraction ◽

Uv Photodetectors ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Photo Response ◽

Xrd Patterns

In the present paper, photoconductivity (PC) of Zinc-oxide (ZnO) nanostructures synthesized by sol-gel method has been investigated. Structural study has been performed by X-ray diffraction (XRD) patterns. The XRD result confirms the formation of hexagonal phase. In the photoconductivity analysis, growth and decay of photocurrent of ZnO nanostructures have been investigated. The photo-response of prepared sample has been measured underUV illumination using thick film of powder without any binder. The growth and decay of photocurrent show fastrise and decay of photocurrent indicating suitability for UV photodetectors applications

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STRUCTURAL STUDIES OF ALUMINUM-DOPED LANTHANUM BORATES

Modern Physics Letters B ◽

10.1142/s0217984902004263 ◽

2002 ◽

Vol 16 (23n24) ◽

pp. 915-921

Author(s):

S. SIMON ◽

M. POP ◽

GH. BORODI ◽

D. DJURADO

Keyword(s):

Rietveld Refinement ◽

Sol Gel ◽

Structural Data ◽

Structural Studies ◽

X Ray Diffraction ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Heat Treated ◽

Xrd Patterns

Powder X-ray diffraction structural studies on aluminum-doped lanthanum borates La 4-y Al y B 4 O 12 were carried out on samples with y = 1, 2 starting compositions heat-treated at temperatures between 860°C and 1200°C. The samples were prepared by the sol-gel method. The structural data were obtained by the Rietveld refinement of the XRD patterns.

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Synthesis, characterization and in vitro cytotoxicity study of Co and Ni ferrite nanoparticles prepared by sol-gel method

SN Applied Sciences ◽

10.1007/s42452-021-04709-y ◽

2021 ◽

Vol 3 (7) ◽

Author(s):

Alexandre Pancotti ◽

Dener Pereira Santos ◽

Dielly Oliveira Morais ◽

Mauro Vinícius de Barros Souza ◽

Débora R. Lima ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Sol Gel ◽

Test Sample ◽

In Vitro Cytotoxicity ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Transmission Electron ◽

Crystallite Sizes

AbstractIn this study, we report the synthesis and characterization of NiFe2O4 and CoFe2O4 nanoparticles (NPs) which are widely used in the biomedical area. There is still limited knowledge how the properties of these materials are influenced by different chemical routes. In this work, we investigated the effect of heat treatment over cytotoxicity of cobalt and niquel ferrites NPs synthesized by sol-gel method. Then the samples were studied using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), Fourier Transform Infrared Spectroscopy Analysis (FTIR), and X-ray fluorescence (XRF). The average crystallite sizes of the particles were found to be in the range of 20–35 nm. The hemocompatibility (erythrocytes and leukocytes) was checked. Cytotoxicity results were similar to those of the control test sample, therefore suggesting hemocompatibility of the tested materials.

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Synthesis and structural characteristics of high surface area TiO2 aerogels by ultrasonic-assisted sol–gel method

Nanotechnology ◽

10.1088/1361-6528/aaa1d1 ◽

2018 ◽

Vol 29 (7) ◽

pp. 075702 ◽

Cited By ~ 6

Author(s):

Feng Qingge ◽

Cai Huidong ◽

Lin Haiying ◽

Qin Siying ◽

Liu Zheng ◽

...

Keyword(s):

Surface Area ◽

Structural Characteristics ◽

High Surface ◽

Sol Gel ◽

High Surface Area ◽

Gel Method ◽

Sol Gel Method ◽

Ultrasonic Assisted

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Annealing Effects on the Physical and Magnetic Properties of Tb1.5Y1.5Fe5O12 Films Nanoparticles Prepared by Sol-Gel Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.756.91 ◽

2013 ◽

Vol 756 ◽

pp. 91-98 ◽

Cited By ~ 2

Author(s):

Ftema W. Aldbea ◽

Noor Bahyah Ibrahim ◽

Mustafa Hj. Abdullah

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Annealing Temperature ◽

Quartz Substrate ◽

Sol Gel ◽

Lattice Parameter ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Iron Garnet

Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900 °C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900°C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-raySpectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealingtemperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. Normal 0 21 false false false MS X-NONE X-NONE MicrosoftInternetExplorer4 Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900°C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900 °C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-ray Spectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealing temperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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Impedance Spectroscopy Study of LiTaO3 Powder Synthesized via Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.545.275 ◽

2012 ◽

Vol 545 ◽

pp. 275-278 ◽

Cited By ~ 1

Author(s):

Lili Widarti Zainuddin ◽

Norlida Kamarulzaman

Keyword(s):

Room Temperature ◽

Single Phase ◽

Sol Gel ◽

Rhombohedral Structure ◽

Spectroscopy Study ◽

X Ray Diffraction ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Impedance Spectroscopy Study

A ceramics sample of LiTaO3 was prepared using a sol-gel method. The sample is annealed at 750 °C for 48 hours. X-ray diffraction analysis indicate the formation of single phase, rhombohedral structure. An ac impedance study was used to analyse the conductivity of LiTaO3 at room temperature and at various temperatures.

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An X-ray Absorption Spectroscopy Study of the Ni K Edge in NiO−SiO2Nanocomposite Materials Prepared by the Sol−Gel Method

The Journal of Physical Chemistry B ◽

10.1021/jp9927911 ◽

1999 ◽

Vol 103 (46) ◽

pp. 10081-10086 ◽

Cited By ~ 34

Author(s):

A. Corrias ◽

G. Mountjoy ◽

G. Piccaluga ◽

S. Solinas

Keyword(s):

Absorption Spectroscopy ◽

Sol Gel ◽

Spectroscopy Study ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

X Ray Absorption

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Magnetic Properties of Bulk Zn0.95-XMnXFe0.05O2 Prepared by Sol-Gel Method and Subsequent Hot Pressing

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.268-270.356 ◽

2011 ◽

Vol 268-270 ◽

pp. 356-359 ◽

Cited By ~ 1

Author(s):

Wen Song Lin ◽

C. H. Wen ◽

Liang He

Keyword(s):

Magnetic Properties ◽

Photoelectron Spectroscopy ◽

Raw Materials ◽

Sol Gel ◽

Secondary Phase ◽

X Ray Diffraction ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Doped Zno

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

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