Article
Physics, Condensed Matter
S. Q. Asadullayeva, G. M. Fatullayeva, N. A. Ismayilova
Summary: The study investigated the photoluminescence properties of (La2O3)(0.05)(As2S3)(0.90)(Er2O3)(0.05) combination in the visible region at different temperatures. It was found that the inclusion of two impurities led to the disappearance of the maximum peak belonging to As2S3 and a sharp increase in the photoluminescence spectrum intensity. The sharp increase in photoluminescence intensity was attributed to the interatomic transition of Er3+ ion in the 600-750 nm region.
SOLID STATE COMMUNICATIONS
(2021)
Article
Spectroscopy
Jie Zhang, Xibin Zhou, Jun Wang, Dawei Fang
Summary: A novel luminescent complex with red color was synthesized for sequential detection of Cu2+ and biothiols. The sensing system showed good selectivity, high sensitivity, and a large Stokes shift.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Wenjuan Cai, Xiaoxia Chen, Ling Xie, Yanhong Yu, Gang Liu, Congbin Fan, Shouzhi Pu
Summary: Hydrogen sulfide (H2S) is an important endogenous signaling molecule involved in redox homeostasis and various biological processes. A fluorescent probe Eu(ttbd)3abt based on europium (III) complex was designed and synthesized for the rapid and sensitive detection of H2S. The probe showed significant quenching for H2S with a long emission wavelength, high selectivity despite interference species, and successful application in water samples.
Article
Materials Science, Multidisciplinary
M. A. Avil, F. J. Gotor
Summary: Solid solution samples of Mn2+-doped ZnSxSe1-x were synthesized through a mechanically-induced self-sustaining reaction process. The band-gap energy of the samples was controlled by changing the stoichiometry of the solid solution. However, an efficiency loss was observed with increasing Se content.
Article
Chemistry, Physical
Yang Zhang, Yu Zhang, Ki-Hee Song, Wei Lin, Cheng Sun, George C. Schatz, Hao F. Zhang
Summary: The study investigated the causes of single-molecule fluorescence spectral heterogeneities and found that they were influenced by structural rigidity and environmental changes. Factors such as system noise uncertainty and environmental polarity were ruled out. The rotational flexibility of N,N-dialkylated groups was found to contribute to the heterogeneities.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Biochemistry & Molecular Biology
Hwan-Woo Park, Daewon Han, Jong-Pil Ahn, Se-hoon Kim, Yoon-Joong Kang, Young Gil Jeong, Do Kyung Kim
Summary: The core-shell structure of poly(St-co-MAA) nanoparticles containing beta-diketonate Eu3+ complexes was successfully synthesized. The nanoparticles exhibited highly monodispersed distribution and near-neutral surface charges. They can serve as a substitute for red luminescent organic dyes for intracellular trafficking and cellular imaging.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Augustin Caillas, Stephan Suffit, Pascal Filloux, Emmanuel Lhuillier, Aloyse Degiron
Summary: This study brings fresh insights into the ensemble properties of PbS colloidal quantum dots by conducting experiments to investigate the radiative recombination of thermalized photocarriers. A phenomenological model based on the Kirchhoff law is proposed to identify the nature of the thermalized photocarriers and extract their temperatures. Two thermalization regimes are observed: one involving photocarriers distributed over a wide energy range and the other solely involving fundamental excitons.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Liliya A. Pasechnik, Alena O. Peshehonova, Olga A. Lipina, Irina S. Medyankina, Andrey N. Enyashin, Alexander Yu Chufarov, Alexander P. Tyutyunnik
Summary: The crystal structure and properties of (NH4)(3)Sc(SO4)(3):0.005Eu(3+) phosphor have been studied. The research revealed a reverse phase transition at a temperature of 350-355 K and compound decomposition only above 573 K. Under the excitation of the light source, the compound exhibited luminescence corresponding to the characteristic transitions of Eu3+ ions.
Article
Chemistry, Physical
Shaokun Ling, Xiaoyan Qin, Chang Chen, Kai Meng, Yifeng Yan, Junyun Ming, Sen Liao, Yingheng Huang, Lei Hou
Summary: Despite long-term development of LEDs, the urgent problem of luminescent stability at high temperature working situation still exists. In this study, a novel type of β-NaYF4-based phosphor incorporated with Eu3+ and Tb3+ was reported. Samples of β-NaYF4:0.065Eu3+,0.002Tb3+ were synthesized and showed optimal luminescent properties at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Geochemistry & Geophysics
Justin Y. Hu, Nicolas Dauphas, Nicole X. Nie, Mathieu Roskosz, Xi Chen, Andy W. Heard, Zhe J. Zhang, Hao Zeng, Esen E. Alp, Michael Y. Hu, Jiyong Zhao
Summary: Rare Earth Elements (REEs) have distinct patterns and radioactive-radiogenic decay systems which are commonly used in Earth and environmental sciences. Advances in analytical techniques now allow the use of REE stable isotopic fractionations in order to clarify uncertainties in REE systematics. This study utilized Nuclear Resonant Inelastic X-ray Scattering (NRIXS) and Density Functional Theory with a Hubbard U correction (DFT+U) to determine equilibrium isotopic fractionation factors for REEs. The findings suggest that REE isotopic fractionation in igneous rocks and minerals is mainly influenced by kinetic effects, and significant Eu isotopic fractionation may occur in hydrothermal fluids.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Chemistry, Inorganic & Nuclear
Junpeng Li, Youkui Zheng, Hongzhi Zhang, Hong Li, Tongsheng Yang, Yuefei Xiang, Jun Zhang, Jing Zhu
Summary: In this study, a red-emitting Ba3(ZnB5O10)PO4:Eu3+ phosphor was prepared using a microwave-assisted solid-state reaction. The Eu3+ activators were solidly dissolved into the BZBP host by occupying the Ba2+ positions. Upon excitation at 395 nm, the phosphor exhibited red emission with high color purity, mainly attributed to the electric dipole transition of Eu3+. The investigation of photoluminescence in response to the Eu3+ content provided insight into the content quenching mechanism. Additionally, the study on luminescence temperature quenching demonstrated the good thermal stability and resistance to chromaticity shifting. The results suggest that the studied phosphor shows promise as an alternative red-emitting material for WLEDs.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
N. Jarucha, Y. Ruangtaweep, P. Meejitpaisan, P. Nawarat, P. Kanthang, N. Wongdamnern, P. Limsuwan, H. J. Kim, J. Kaewkhao, T. Sareein
Summary: This study investigated europium-doped lithium sodium potassium borate glasses and found that 0.3 mol% europium doping concentration was the optimal concentration. The results showed the potential of using this glass for high power red laser devices.
INTEGRATED FERROELECTRICS
(2023)
Article
Materials Science, Ceramics
Juan Liu, Jingjing Liu, Wenchao Zhang, Kai Li, Chao Liu
Summary: Lead chalcogenide quantum dots with controlled composition, size, and optical properties are obtained in glasses through precipitation and thermal treatment. The addition of chalcogen elements in the glasses and the adjustment of heat-treatment conditions enable modulation of the properties of PbSexS1-x quantum dots. Increasing the concentration of S in the glasses reduces the relative fraction of Se in the quantum dots, while higher heat-treatment temperatures promote the enrichment of Se in the quantum dots. These alloyed quantum dots exhibit improved photoluminescence quantum yields and enhanced resistance to thermal quenching.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
B. Han, X. Yang, J. Ren, L. Liu, E. Zhao, X. Zhu, J. Zhu, H. Ma, A. Li, P. Teng
Summary: In this study, a novel deep-red phosphor SGTO:Mn4+ was synthesized, which can be effectively excited by near-ultraviolet light and emit deep-red light that matches the absorption band of plant phytochromes. The results indicate that SGTO:0.006Mn4+ is a suitable phosphor for indoor plant growth lighting.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Environmental Sciences
Julia Stadler, Manja Vogel, Robin Steudtner, Bjorn Drobot, Anna L. Kogiomtzidis, Martin Weiss, Clemens Walther
Summary: A combination of biochemical preparation methods with microscopic, spectroscopic, and mass spectrometric analysis techniques was used to visualize and identify europium in plants. This study provides insights into the speciation of Rare Earth Elements (REE) and trivalent f-elements, and demonstrates the chemical journey of europium through winter rye. Through various analytical techniques, including SEM, EDS, mass spectrometry, and luminescence measurements, the distribution and species of Eu(III) in plants were determined. This work contributes to a better understanding of the uptake mechanisms of f-elements in plants.
Article
Physics, Multidisciplinary
T. G. Naghiyev
Summary: This study investigates the (n, p) and (n, alpha) modifications caused by neutrons in AlN nanoparticles at different energies using computer modeling. The effective cross section spectra for the modifications in the Al and N atoms were separately studied, revealing differences in the probable modifications between different types of aluminum and nitrogen atoms.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2021)
Article
Physics, Applied
T. G. Naghiyev
Summary: The study used computer modeling to investigate neutron absorption in nano-Si3N4 particles at different energies. It focused on the absorption properties of silicon and nitrogen atoms, as well as the effective cross-section spectra of neutrons for these atoms.
MODERN PHYSICS LETTERS B
(2021)
Article
Materials Science, Ceramics
Elchin M. Huseynov, Tural G. Naghiyev, Adil A. Garibov, Nijat R. Abbasov, Oqtay A. Samedov, Reshid C. Gasimov, Mahammad A. Bayramov
Summary: Paramagnetic centers in nanocrystalline boron nitride particles were studied before and after neutron irradiation, with more paramagnetic centers observed in the range of 0.3270-0.3370 T. The formation mechanism of VB and VN vacancies through neutron transmutations was examined in detail.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Elchin M. Huseynov, Tural G. Naghiyev
Summary: Thermal properties of nanocrystalline silicon carbide particles were studied at different thermal processing rates, determining the kinetical parameters such as heat flux, oxidation reaction rate, and activation energy. The results showed variations in activation energies of nanocrystalline 3C-SiC particles at different thermal processing rates.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Physics, Applied
T. G. Naghiyev
Summary: The neutron capture processes in AlN nanoparticles were studied using computer modeling, focusing on the separate absorption of neutrons by aluminum and nitrogen atoms. Modeling was done for each stable isotope of Al and N due to differences in effective absorption cross-sections, and effective cross-section spectra for neutron capture by aluminum and nitrogen atoms were compared.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2021)
Article
Physics, Applied
M. S. Leanenia, E. V. Lutsenko, M. V. Rzheutski, G. P. Yablonskii, T. G. Naghiyev, O. B. Tagiev
Summary: The study investigates the photoluminescence properties of the CaGa2S4:Pr3+ chalcogenide semiconductor compound, revealing intense emission lines and various excitation energy levels. Experimental results show significant variations in PL intensity at different temperatures and concentrations of Pr3+.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Astronomy & Astrophysics
T. G. Naghiyev
Summary: Computer modeling was used to study the (n, alpha) transmutations in Si3N4 nanoparticles under the influence of neutrons at different energies. The research found the varying effects of neutrons on different stable isotopes in the nanoparticles.
MODERN PHYSICS LETTERS A
(2021)
Article
Materials Science, Multidisciplinary
Elchin M. Huseynov, Tural G. Naghiyev
Summary: This study analyzed the thermal parameters of nanocrystalline silicon carbide (3C-SiC) particles at different thermal processing rates. The study investigated the hydroxyl groups on the surface of the particles and determined the specific heat capacity, Gibbs energy, enthalpy, and entropy of the silicon carbide nanoparticles. The experimental results were compared at different thermal processing rates.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Condensed Matter
O. B. Tagiev, E. G. Asadov, K. O. Tagiev, G. S. Gadzhieva, T. G. Naghiyev
Summary: The study shows that the PL intensity of samples significantly increases with increasing gamma irradiation dose and concentration of Eu2+ ions. Additionally, a blueshift in PL maxima is observed when Ga ions are partially substituted with Al ions, leading to efficient luminescence emission in the green-yellow region.
SOLID STATE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Elchin M. Huseynov, Tural G. Naghiyev, Nijat R. Abbasov
Summary: The effects of neutron irradiation on paramagnetic centers in nanocrystalline h-BN particles were investigated using EPR spectroscopy. The formation of new paramagnetic centers in h-BN nanoparticles induced by neutron flux was explained by EPR spectra.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Physics, Applied
A. P. Abdullayev, R. M. Rzayev, T. G. Naghiyev, J. P. Mammadova, S. S. Aliyev, I. V. Musazade
Summary: Single crystals of TlGaTe2 were grown using the Bridgman method. Current-voltage characteristics were measured, revealing the presence of the Poole-Frenkel effect in the nonlinear region along both the parallel and perpendicular crystallographic axes. The concentration of ionized centers (N-t), mean free path (lambda), Frenkel coefficient (beta), and shape of the potential well in TlGaTe2 crystals were calculated.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Physics, Applied
Tural G. Naghiyev
Summary: In this study, silicon nitride (Si(3)N4) nanoparticles were irradiated with neutrons at different energy fluxes. Differential thermal analysis was performed on non-irradiated and neutron irradiated samples in the temperature range of 300-1400 K. Thermophysical parameters were calculated based on the experimental results and discussed in detail. The effects of neutron irradiation on the entropy, enthalpy, and heat transfer in Si3N4 nanoparticles were investigated.
MODERN PHYSICS LETTERS B
(2023)
Article
Physics, Applied
R. F. Babayeva, T. G. Naghiyev
Summary: n-InSe single crystals were grown using the Bridgman method and the electroluminescence phenomenon was experimentally studied in undoped and rare-earth-doped (Dy and Er) crystals. It was observed that electroluminescence occurred at T <= 160-165K and in the wavelength range of approximately 0.900-1.150 μm in both groups of crystals, regardless of initial dark resistivity (rho(D0)) and impurity concentration (N). The brightness characteristics and its dependence on current strength were investigated, with results showing that brightness also depended on initial dark resistivity and impurity concentration. The highest luminescence brightness and the most stable and reproducible electroluminescence characteristics were observed in doped crystals. The features of electroluminescence in both undoped and rare-earth-doped crystals conformed to theoretical concepts developed for spatially homogeneous crystalline semiconductors.
MODERN PHYSICS LETTERS B
(2023)
Article
Physics, Applied
I. K. Aliyeva, T. G. Naghiyev, E. R. Aliyeva
Summary: The dependence of electrical durability Tau (E) on temperature T was measured for polymer compositions of PP-LDPE with different SMS. At elevated temperatures (above 200K), the dependence of lg Tau (E)(T-1) is linear, indicating a thermofluctuational mechanism of breakdown preparation; at low temperatures (below 200K) Tau (E) does not depend on T, suggesting a tunneling mechanism. The transition temperature of the linear dependence lies in the 200K range and varies with the applied electric field.
MODERN PHYSICS LETTERS B
(2023)
Article
Materials Science, Multidisciplinary
Elchin M. Huseynov, Tural G. Naghiyev
Summary: The heat flux and mass change of AlN nanoparticles were investigated as a function of temperature and heating rates. The Gibbs energy of the system was determined in the temperature range of 300 to 1400K, with heating rates of 5, 10, 15, and 20 K/min. The experimental results of heating and cooling processes were analyzed, and the formation of AlxNyOz compound due to surface oxidation under temperature influence was explained by phonon oscillations on the Raman spectrum. The effects of hydroxides on crystallization and properties of the material were observed on the Raman spectrum, along with the formation of Al(OH)3 or AlOOH on the surface of nanoparticles due to hydration.
