Article
Materials Science, Ceramics
A. Moussaoui, D. Bulyga, S. K. Evstropiev, A. I. Ignatiev, N. Nikonorov, Y. F. Podruhin, R. Sadovnichii
Summary: Gadolinium oxide nanopowders doped with neodymium were prepared using a modified Pechini method with double nanoparticle stabilization. Polyvinylpyrrolidone acted as an additional stabilizer and fuel during the synthesis process, contributing to the high quality of the synthesized nanopowders. Various analysis techniques were used to study the thermal evolution of the materials at different stages of treatment, including photoluminescence, FTIR spectroscopy, DTA/TG, XRD, and SEM analysis.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Greta Inkrataite, Meldra Kemere, Anatolijs Sarakovskis, Ramunas Skaudzius
Summary: This study investigated the impact of boron doping on YAG, YLuAG, and LuAG materials, showing that the addition of boron can indeed shorten decay time and increase emission intensity. Powder compounds containing 1% and 5% boron exhibited the most intense emission, while pure samples doped with 5% boron showed the shortest decay times.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Dhiraj Kumar Bharti, Rajni Verma, Sonam Rani, Daksh Agarwal, Sonali Mehra, Amit Kumar Gangwar, Bipin Kumar Gupta, Nidhi Singh, Avanish Kumar Srivastava
Summary: In this study, highly crystalline bi-functional manganese-doped zinc silicate (Mn-doped Zn2SiO4) nanostructures were synthesized using a low-cost sol-gel route followed by solid state reaction method. Structural and morphological characterizations of the doped nanostructures were conducted using X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM) techniques. Photoluminescence (PL) spectra showed strong green emission at 521 nm under 259 nm excitation wavelengths, with the intensity increasing with increasing Mn-doping concentration. The magnetic properties of the doped nanostructures were also investigated. These findings open up new possibilities for the application of Mn-doped Zn2SiO4 nanostructures in magneto-optical and spintronic devices.
Article
Optics
Y. Lozano, J. Isasi, M. Fernandez-Ramos, M. Rapp, M. Alcolea Palafox, E. Ortiz-Rivero, T. Munoz-Ortiz
Summary: In this study, novel non-covered and silica-covered Y0.9Tm0.1-xYbxVO4 samples with different dopant content were synthesized by hydrothermal synthesis. The relationship between synthesis method, dopant content and luminescence emission was systematically studied. The results showed zircon-type structure of the obtained samples, and two different morphologies in un-coated samples. The samples doped with erbium exhibited up-conversion emission under excitation at 980 nm, while the samples doped with thulium showed characteristic emission band under excitation at 790 nm. These samples have the potential to be used as luminescent thermometers in the physiological temperature range.
JOURNAL OF LUMINESCENCE
(2023)
Article
Optics
Pontsho Mbule, Dumisani Mlotswa, Bakang Mothudi, Mokhotjwa Dhlamini
Summary: This study demonstrated the sol-gel synthesis of Dy3+-doped zinc silicate nanophosphor and evaluated its properties for solid state lighting and dosimetry applications. The synthesized nanophosphors exhibited an alpha-Zn2SiO4 crystallite phase and spherical nanoparticle morphology. The photoluminescence properties showed relatively high emission with 2 mol% Dy3+ ions, making it a promising phosphor for dosimetry application.
JOURNAL OF LUMINESCENCE
(2021)
Article
Materials Science, Multidisciplinary
Pawan Kumar, Devender Singh, Isha Gupta, Sitender Singh, Simran Nehra, Ramesh Kumar
Summary: A gel-combustion approach was used to synthesize Y4-xAl2O9: xEr3+ nanophosphors with cool greenish light emission for display applications. The nanophosphors exhibited a monoclinical crystal structure and non-uniform agglomeration of particles in the nano region. The strongest emission peak was observed at 549 nm due to the transition of trivalent erbium ion, producing greenish light. The results support the usage of these nanophosphors as green components in display fabrication.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
P. Diana, D. Sivaganesh, V. Sivakumar, J. Nandha Gopal, S. Sebastian, S. Saravanakumar
Summary: This study investigated the influence of Mn2+ impurity on the synthesis of phase-pure alpha-Zn2SiO4 phosphors. The results showed that 4% Mn-doped Zn2SiO4 material exhibited high quantum yield and efficient emission, as well as enhanced thermoluminescence intensity, indicating the presence of deeper traps within the bandgap. These findings highlight the potential applications of Mn-doped Zn2SiO4 phosphors in lighting and dosimetry.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
M. Benchikhi, R. Hattaf, A. Moutaabbid, R. El Ouatib
Summary: Cobalt-substituted zinc orthosilicate pigments were successfully synthesized through a hydrothermal-assisted sol-gel process, showing excellent coloring performance and stability suitable for ceramic glazes. The presence of Co2+ ions in tetrahedral sites of Zn2+ contributes to the blue color of the pigments, making them promising for use in ceramic tiles.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
H. A. Othman, H. Ammar, A. Hussein, H. El-Samman, S. A. Alawsh, I. A. El-Mesady
Summary: This study examines the structural impacts of co-doped aluminum oxide with crystalline micro and nanoparticles on their thermoluminescent features. The introduction of trace amounts of P and Ca as co-dopants with Cr and Si in Al2O3 is found to significantly increase TL-response. This indicates a structural dependence of the studied samples on their TL-responses.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Joshua P. Smith, Kurt E. Sickafus, Claudia J. Rawn, Cordell Delzer, Ching-Fong Chen, Charles Melcher
Summary: Li-containing garnet compounds have potential as transparent ceramic dual-mode scintillators, with Li5La3Ta2O12 showing promise due to its properties. This study focused on establishing thermal processing conditions for a sol-gel method and consolidating powders to form high-density ceramics. The experiments showed the presence of two cubic Li5La3Ta2O12 garnet phases with different lattice parameters, indicating a remaining excess of Li in the ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Teng Zheng, Marcin Runowski, Natalia Stopikowska, Malgorzata Skwierczynska, Stefan Lis, Peng Du, Laihui Luo
Summary: Optical thermometers based on Er3+/Tm3+/Yb3+-doped Bi2MoO6 materials exhibit bright color-tunable upconversion emissions and exceptional thermal sensitivity, making them promising candidates for multi-parameter temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
K. Pratibha, Harpreet Chitralekha, Harpreet Kaur, S. Shankar, S. Gaurav, Y. Dwivedi
Summary: Zinc Silicate (Zn2SiO4) nanophosphors were synthesized using coprecipitation method and their structural, optical, and electrical properties were investigated. The annealing temperature was found to affect the crystal size, lattice parameter, and crystallinity of the Zn2SiO4 nanophosphors. The nanophosphors exhibited a maximum absorption peak with a bandgap of 5.53 eV at an annealing temperature of 1000°C. The emission spectra showed self-luminescence in the green spectral region at 520 nm, with a decrease in emission intensity at higher annealing temperatures. The Zn2SiO4 nanophosphors can be used for cool white light applications, with the highest color correlated temperature achieved at 1000°C annealing temperature. The dielectric measurements revealed interfacial polarization and non-Debye type relaxation in the nanophosphors, with the highest permittivity and low dielectric loss observed at 900°C and 1100°C annealing temperatures. These results provide insights into the potential applications of Zn2SiO4 nanophosphors for white light and microelectronic devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Ceramics
Angel de Jesus Morales-Ramirez, Margarita Garcia-Hernandez, Maria Luz Carrera-Jota, Paulina Garnica-Chavez, Brenely Gonzalez-Penguelly, Aristeo Garrido-Hernandez
Summary: Lu2Si2O7:Eu3+ thin films were prepared using sol-gel methods and dip coating, and exhibited a monoclinic structure with preferential orientation along a specific direction after heat treatment. The films showed strong emission from Eu3+ ions, with the optical yield and decay time increasing with the SiO2 content.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Bingjun Zhu, Shiqi Ren, Dong Zhang, Qingru Wang, Bing Yang, Qinglin Wang, Shuhong Li, Wenjun Wang, Bingyuan Zhang, Cailong Liu
Summary: Cr3+/Mn2+ co-doped ZnAl2O4 (ZAO) phosphors were synthesized using a sol-gel method, showing improved red emission performance with good crystallinity and energy transfer efficiency.
JOURNAL OF LUMINESCENCE
(2021)
Article
Optics
Vijay Singh, Aman Prasad, Nisha Deopa, A. S. Rao, SoonWon Jung, N. Singh, J. L. Rao, G. Lakshminarayana
Summary: A series of green-emitting Zn2-xSiO4:xMn powder phosphors with willemite structure were fabricated using a sol-gel procedure, showing significant influence of Mn2+ ion concentration on photoluminescence intensity. The optimized phosphor displayed green region in the CIE diagram, suitable for display devices.
Article
Polymer Science
A. Bouzidi, K. Omri, W. Jilani, H. Guermazi, I. S. Yahia
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2018)
Article
Polymer Science
K. Omri, N. Alonizan
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2019)
Article
Engineering, Electrical & Electronic
K. Omri, R. Lahouli
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2019)
Article
Materials Science, Multidisciplinary
K. Omri, R. Lahouli, L. El Mir
RESULTS IN PHYSICS
(2019)
Article
Physics, Multidisciplinary
S. Mourad, J. El Ghoul, K. Omri, K. Khirouni
Article
Chemistry, Physical
A. Mahmoud, M. Echabaane, K. Omri, L. El Mir, R. Ben Chaabane
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Physical
Houda Mansour, K. Omri, Saleh Ammar
Article
Polymer Science
F. Alharbi, K. Omri, I. Yahia, S. El-Beshir
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2020)
Article
Engineering, Electrical & Electronic
K. Omri, A. Alyamani, L. El Mir
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2019)
Article
Materials Science, Multidisciplinary
K. Omri, F. Alharbi
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Houda Mansour, K. Omri, Radhouane Bargougui, Salah Ammar
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
M. W. Marashdeh, B. Ababneh, O. M. Lemine, Ahmed Alsadig, K. Omri, L. El Mir, A. Sulieman, Essam Mattar
RESULTS IN PHYSICS
(2019)
Article
Polymer Science
Soumaya Gouadria, Zainab Mefrah Elqahtani, Fatemah Farraj Alharbi, K. Omri
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2020)
Article
Polymer Science
N. Alonizan, L. Chouiref, K. Omri, M. A. Gondal, Nawal Madkhali, Taher Ghrib, Abdullah I. Alhassan
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2020)
Article
Materials Science, Ceramics
F. Alharbi, I. H. Mejri, W. Hzez, K. Omri
CERAMICS INTERNATIONAL
(2020)
