Swift heavy ion (SHI) irradiation with 150 MeV Xe ions (5 ร 109 - 5 ร 1011 ions cm-2) was used to tune the defect landscape and morphology of hydrothermally grown BiVO4 (BVO) thin films, aiming to enhance their photoelectrochemical (PEC) performance for the oxygen evolution reaction (OER). Irradiation induces residual stress, partial amorphization, and bismuth-rich hillocks over...
In this study, Li2SrSiO4:Ga (0.2, 0.4, 0.6, 0.8, and 1%) series phosphors were synthesised by the combustion method. Crystal structural analysis through X-ray diffraction (XRD) confirmed a hexagonal crystal structure of the prepared nanocomposites. SEM revealed differences in morphology with increasing dopant content. EDS analysed the elemental composition of the nanocomposites. The...
ELECTROPHYSICAL PROPERTIES OF n-Si<Pd>, IRRADIATED WITH GAMMA-RAYS
Sh.B. Utamuradova1, D.A. Rakhmanov1*, A.S. Doroshkevich2, A.Tatarinova2,
1Institute of Semiconductor Physics and Microelectronics at the National University of Uzbekistan, 20 Yangi Almazar st., Tashkent, 100057, Uzbekistan;
2 Joint Institute for Nuclear Research, 141980, Dubna, Russia;
In the context of the rapid...
Lithium-rich layered oxide (LRLO) cathodes (Li1.2Mn0.8O2) offer high theoretical
capacities during their utilization as cathode materials in lithium-ion batteries but
suffer from voltage fading, structural degradation, and phase instability during
cycling, due to the migration of transitional metal and irreversible oxygen loss. In this
study, we explore the role of titanium doping in...
Sulforaphane (SFN) is a phytochemical compound that is being actively studied due to its potential anti-cancer and antibacterial properties. It is found in cruciferous plants of the cabbage family, such as broccoli, cauliflower and kohlrabi, and is the subject of intensive research, especially in the field of oncology. It is known that the interaction of anticancer drugs with cell membranes...
SIMULATION OF A NEUTRON REFLECTOMETRY EXPERIMENT FOR A HELICOID
R.N. Sadradze$^{2*}$, V. D. Zhaketov$^{1,2}$
- Joint Institute for Nuclear Research ,
Dubna, Russia 141980 - ยซDubna State Universityยป,
Dubna, Russia 141980
*e-mail: srn.22@uni-dubna.ru
Layered nanostructures are of interest for research in the field of information storage and spintronics. Spintronics, as an...
Iron-based alloys have many useful functional properties that have been widely used in various technologies for a long time. One of these properties is "giant" magnetostriction, which was discovered in the early 2000s in Fe-Ga alloys. These alloys, whose magnetostriction shows two peaks depending on Ga content, have been actively studied for the past twenty years. [1.]. An interesting research...
The method of small-angle X-ray scattering was used to study the supramolecular organization in segmented polyurethanes modified with different copper-containing metal complexes. It was found that with an increase in the concentration of the modifier, the average particle size in the materials changes differently. In one series, this parameter increases, while in the other it remains constant
Copper (II) oxide (CuO), a stable, abundant and environmentally friendly p-type semiconductor with a narrow bandgap ranging from 1.21 to 1.55 eV, is increasingly investigated for advanced optoelectronic devices. Among the various approaches to tailor the properties of materials, defect engineering stands out, including thermal treatments, doping and irradiation, as key techniques to control...
New high-brilliance ultracold neutron source at the IBR-2 pulsed reactor is currently being developed at the FLNP JINR. Work on the project of a new type of UCN source requires conducting a series of methodical experiments with very cold neutrons, which are currently not feasible at JINR. Therefore, at the first stage of work on the project, it is planned to create a prototype VCN channel. It...
A thin oxide layer called the native oxide layer forms on the surface of semiconductor materials when they are exposed to air. This native oxide layer has a significant impact on the electrical properties and operation of semiconductor devices. A common semiconductor material in electrical and optoelectronic applications is Gallium arsenide (GaAs). In order to enhance the functionality,...
Non-stoichiometric spinel ferrites are attracting increasing interest for gas sensing because their electrical and surface properties can be altered through composition control. In this work, ZnxFeโOโ nanostructures with varying zinc content (0.95,1.00,1.05) were synthesized with a microwave-assisted coprecipitation method and investigated for the detection of toxic and flammable gases. The...
The bioengineering of bimetallic oxides is an essential requirement for both societal and environmental applications. In this research, bimetal oxide nanomaterials, particularly Zinc orthotitanate (Alpha-Zn2-TiO4), were synthesized using an environmentally friendly method that incorporates natural extracts from Hibiscus Sabdariffa. A variety of techniques were employed to examine...
This study theoretically examines the impact of gamma radiation on a one-dimensional photonic crystal detector, focusing on reflectivity in the visible spectrum using polymer material. This polymer layer consists of polystyrene which is doped by methylene blue. The photonic crystal unit cell consists of alternating layers of silicon dioxide and silicon. We use the characteristic matrix method...
The irreversibility field (H_irr) in practical superconductors is frequentlyโand erroneouslyโidentified with the onset of resistive transition in transport measurements. This assumption lacks fundamental justification and is valid only in limited cases, such as granular superconductors with weak intergranular coupling. In contrast, in materials exhibiting ฮดl -pinning, where effective pinning...
The study of phase transformations in iron-based alloys is one of the key areas of materials science. Particular attention is devoted to Fe-based systems alloyed with elements such as Ga and Ge. These additions can significantly affect magnetostrictive properties, making such alloys promising for practical applications [1]. It is well established that the initial chemical composition of an...
