{"title":"Lasing Effect in a Binary Photoaligned Layer of a Cholesteric Liquid Crystal","authors":"S. P. Palto, D. O. Rybakov, I. V. Simdyankin","doi":"10.1134/S1063774526601309","DOIUrl":"10.1134/S1063774526601309","url":null,"abstract":"<p>The boundary conditions for the binary planar-homeotropic alignment of liquid crystals have been created using the photoalignment technique. Under these conditions, an orientational transition to the deformed lying helix state occurs in a cholesteric liquid crystal layer with the initial Grandjean texture under the action of an electric field. In the deformed lying helix state, the electric field-induced photonic stop bands exist for light propagating in the waveguide mode. In this study, the lasing effect has been investigated, which occurs at the short-wavelength edge of the tenth-order induced stop band overlapping with the amplified luminescence spectrum of a laser dye included in a cholesteric liquid crystal. It is shown that the electric field range in which the lasing effect occurs is consistent with the range of the increased diffraction efficiency of the deformed lying helix.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"450 - 455"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. S. Ivanovsky, A. A. Tyulenev, V. I. Timofeev, Y. V. Kordonskaya, M. A. Marchenkova, A. P. Trashkov, Y. V. Pisarevsky, Yu. A. Dyakova
{"title":"Structural Stability of Borrelia Burgdorferi Flagellin upon the Deletion of Allergenic Regions Based on Molecular Dynamics Simulations","authors":"A. S. Ivanovsky, A. A. Tyulenev, V. I. Timofeev, Y. V. Kordonskaya, M. A. Marchenkova, A. P. Trashkov, Y. V. Pisarevsky, Yu. A. Dyakova","doi":"10.1134/S1063774526601188","DOIUrl":"10.1134/S1063774526601188","url":null,"abstract":"<p>The development of effective and safe vaccines against Lyme disease caused by <i>Borrelia burgdorferi</i> spirochetes remains an urgent task, particularly given the lack of approved preventive measures in Russia. Adjuvants are used to enhance the immune response to vaccines, especially to peptide-based vaccines. <i>Borrelia burgdorferi</i> flagellin, a natural ligand for the Toll-like receptor 5, has a significant adjuvant potential; however, its application is limited by the risk of allergic reactions. Allergenic regions of the <i>Borrelia burgdorferi</i> flagellin molecule were predicted using immunoinformatics tools. The three-dimensional structures of both native and modified flagellin with deleted allergenic regions were modeled using AlphaFold3. Molecular dynamics simulations were applied to both forms. It was shown that the flagellin molecule with deleted allergenic regions remains stable in an aqueous saline solution. Molecular docking results confirm that the modified flagellin retains its ability to bind to the Toll-like receptor 5.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"426 - 430"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development and Approbation of a Method for Automatic Classification of Sedimentary Rock Type Based on X-Ray Diffraction Data Using Machine Learning Algorithms","authors":"Yu. A. Ubaskina, V. A. Minkina","doi":"10.1134/S1063774526601437","DOIUrl":"10.1134/S1063774526601437","url":null,"abstract":"<p>A method for automatic classification of sedimentary rock types (bentonite, opoka, diatomite) based on X-ray diffraction data is presented. This method utilizes the ResNet-18 convolutional neural network architecture. The choice of a model is justified by its residual connections, which minimize the vanishing gradient problem and ensure effective training when working with noisy diffractograms. The advantage of classifying diffractograms in a graphical format over analyzing raw digital data is demonstrated, since the model perceives the X-ray diffraction profile as a holistic pattern, extracting hidden features from the entire range of angles. Transfer learning was applied by freezing the convolutional layers pre-trained on the ImageNet dataset and fine-tuning the fully connected layer for the target categories. Image augmentation was used to enhance the robustness of the model. The developed approach accelerates the process of determining the type of raw material when assessing the potential for involving deposits in industrial exploitation.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"519 - 527"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. I. Sorokina, B. I. Zadneprovski, I. A. Verin, N. E. Novikova
{"title":"Structural and Morphological Features of Single Crystals of Cd1–xZnxWO4 Solid Solutions","authors":"N. I. Sorokina, B. I. Zadneprovski, I. A. Verin, N. E. Novikova","doi":"10.1134/S1063774526601255","DOIUrl":"10.1134/S1063774526601255","url":null,"abstract":"<p>The results of studying the structural and morphological features of single crystals of Cd<span>(_{{1--x}})</span>Zn<sub><i>x</i></sub>WO<sub>4</sub> solid solutions with a wolframite structure, grown by spontaneous crystallization, are presented. The crystals form a continuous series of single-phase substitutional solid solutions in the Zn/Cd cation sublattice. The crystal growth forms and their sequence with changes in the Zn/Cd ratio were defined. Using X-ray diffraction analysis, the unit cell parameters were determined, and the structure of Cd<span>(_{{1--x}})</span>Zn<sub><i>x</i></sub>WO<sub>4</sub> crystals was refined for a number of their compositions. It was found that the dependences of the parameters <i>a</i> and <i>c</i> correspond to Vegard’s linear law, while the dependence of the parameter <i>b</i> deviates from it. In crystals of mixed cationic composition (Cd<span>(_{{1--x}})</span>Zn<sub><i>x</i></sub>)<sup>2+</sup>, a redistribution of electron density was revealed near tungsten atoms, indicating their structural disorder. For crystals of different composition, the coordination polyhedra WO<sub>6</sub> and (Cd<span>(_{{1--x}})</span>/Zn<sub><i>х</i></sub>)O<sub>6</sub> were characterized, and their arrangement in the structure relative to the main crystallographic directions was studied. The structural features of the crystals were compared with their Raman spectra. The types of possible structural disorder in the crystals were characterized.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"388 - 399"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Computer Simulation of Rare-Earth Molybdate Crystals of the R5Mo3O16 Family. III. Co-Anion–Cation Diffusion in MxNd5–xMo3O16–δ (M = Li, Na; x = 0.2, 0.5)","authors":"A. K. Ivanov-Schitz","doi":"10.1134/S1063774526601504","DOIUrl":"10.1134/S1063774526601504","url":null,"abstract":"<p>Ion transport processes in neodymium molybdate crystals <span>({{M}_{x}}{text{N}}{{{text{d}}}_{{5--x}}}{text{M}}{{{text{o}}}_{3}}{{{text{O}}}_{{15.52}}})</span> (<i>M =</i> Li, Na; <i>x</i> = 0.2, 0.5) with doping of the cation sublattice were studied using the molecular dynamics method. High mobility of both oxygen anions and lithium (sodium) cations at elevated temperatures was observed for the first time. In the anionic (oxygen) sublattice, the ion transport occurs due to O2-type anions, while the diffusion coefficient is 6 × 10<sup>–7</sup> cm<sup>2</sup>/s at 2100 K. Substitution of Nd2-type cations by lithium (sodium) cations leads to noticeable diffusion of the latter: <i>D</i><sub>Li</sub> = 3.6 × 10<sup>–7</sup> cm<sup>2</sup>/s and <i>D</i><sub>Na</sub> = 3 × 10<sup>–8</sup> cm<sup>2</sup>/s at 2100 K for <i>x</i> = 0.5. The more noticeable diffusion of lithium is due to the fact that approximately 70% of lithium ions and only 10% of sodium cations participate in transport processes. Furthermore, within the framework of the hopping mechanism, lithium (sodium) ions move through vacant positions, with Li cations participating in a series of successive hops with a displacement of ~6 Å.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"431 - 440"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. A. Karmanov, N. D. Yakushova, I. A. Gubich, I. A. Pronin
{"title":"Photocatalytic Degradation of Combinations of Organic Pollutants on the Surface of Nanostructured ZnO : Cu,Co Films","authors":"A. A. Karmanov, N. D. Yakushova, I. A. Gubich, I. A. Pronin","doi":"10.1134/S1063774526601292","DOIUrl":"10.1134/S1063774526601292","url":null,"abstract":"<p>A simple method for forming nanostructured zinc oxide films containing copper and cobalt as dopants using sol–gel technology was developed. It is shown that the introduction of 3 at % Cu and 3 at % Co into ZnO leads to a significant decrease in the optical band gap to 3.09 eV and an increase in the Urbach tail energy to 0.67 eV. The features of photocatalytic degradation of combinations of organic pollutants on the surface of the studied films were investigated using a mixture of methyl orange and ciprofloxacin as an example. It is found that, in the case of exposure to UVA radiation with a central wavelength of 365 nm, the highest values of the reaction rate constants of 10.04 and 3.51 min<sup>–1</sup> correspond to pure ZnO in the decomposition of ciprofloxacin and methyl orange, as components of the mixture. The use of UVC radiation with a linear spectrum of wavelengths of 185 and 254 nm demonstrates the highest value of the reaction rate constant of 6.27 min<sup>–1</sup> for the decomposition of ciprofloxacin on the surface of nanostructured ZnO : Cu,Co films.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"481 - 491"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. L. Belokoneva, E. P. Teryoshkina, O. V. Dimitrova, A. S. Volkov
{"title":"Symmetrical Relationship of Modifications of Perovskite-Related Nonlinear Optical Crystal of CsIO3","authors":"E. L. Belokoneva, E. P. Teryoshkina, O. V. Dimitrova, A. S. Volkov","doi":"10.1134/S1063774525601728","DOIUrl":"10.1134/S1063774525601728","url":null,"abstract":"<p>A<b>bstract</b>—Nonlinear optical single crystals of CsIO<sub>3</sub> were synthesized by the hydrothermal method. The structure was refined in the rhombohedral setting, sp. gr. <i>R</i>3<i>m</i>, <i>a</i> = 4.6796(2) Å, α = 90.000(1)°. It was shown that the known monoclinic modification is in fact orthorhombic. Its atomic coordinates were predicted. This modification is identical to the orthorhombic phase, which was obtained recently at a pressure of 14.4 GPa. The phase transition from the trigonal to orthorhombic modification was structurally rationalized and more complex structures were predicted using topology and symmetry analysis. For the tetragonal modification, which was also obtained at a high pressure, the proposed atomic coordinates were corrected. The relation to the perovskite structure was analyzed.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"400 - 408"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. V. Gainutdinov, A. L. Tolstikhina, I. P. Makarova, V. A. Komornikov
{"title":"AFM Study of the Structure and Electrical Properties of Proton-Conducting Composite Materials Based on Cs4(HSO4)3(H2PO4)","authors":"R. V. Gainutdinov, A. L. Tolstikhina, I. P. Makarova, V. A. Komornikov","doi":"10.1134/S1063774526601462","DOIUrl":"10.1134/S1063774526601462","url":null,"abstract":"<p>Atomic force microscopy (AFM) was used to diagnose the surface morphology and local electrical properties of <i>x</i>Cs<sub>4</sub>(HSO<sub>4</sub>)<sub>3</sub>(H<sub>2</sub>PO<sub>4</sub>) + (1 – <i>x</i>)AlPO<sub>4</sub> composite materials of compositions <i>x</i> = 0.9, and 0.8. The results of statistical analysis of the relief parameters and grain sizes of polycrystalline proton-conducting compound are presented. The local current–voltage characteristics, reflecting the effect of the composition on the sample conductivity, were obtained. Images of the samples were recorded, and heterogeneity of the spatial distribution of the surface potential and surface conductivity of the layers at the microscopic level was established. Methodical approaches for the application of AFM to the study of the surface, microstructure, and local electrical properties of composite materials based on acid salts of alkali metal are proposed.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"466 - 473"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. S. Komolov, I. A. Pronin, E. F. Lazneva, E. A. Dubov, A. A. Komolova, E. V. Zhizhin, D. A. Pudikov, S. A. Pshenichnyuk, Ch. S. Becker, M. S. Kazantsev, F. O. Kuryozov, U. B. Sharopov, A. A. Chernyshev
{"title":"Vacant Electronic States of Furan-Phenylene Co-Oligomer Films on the Surface of Molybdenum Oxide","authors":"A. S. Komolov, I. A. Pronin, E. F. Lazneva, E. A. Dubov, A. A. Komolova, E. V. Zhizhin, D. A. Pudikov, S. A. Pshenichnyuk, Ch. S. Becker, M. S. Kazantsev, F. O. Kuryozov, U. B. Sharopov, A. A. Chernyshev","doi":"10.1134/S1063774526601127","DOIUrl":"10.1134/S1063774526601127","url":null,"abstract":"<p>The results of a study of the electronic states of the conduction band using total current spectroscopy of films of unsubstituted and fluorinated furan-phenylene co-oligomers on the MoO<sub>3</sub> surface are presented. An analysis of the experimental results and the results of theoretical calculations using the density functional theory (DFT) method is carried out to establish the main maxima of the density of electronic states of the studied films in the energy range from 5 to 20 eV above the Fermi level. The maxima of the density of electronic states in the spectra from films of fluorine-substituted molecules are shifted relative to the similar maxima in the spectra from films of unsubstituted molecules by approximately 1 eV toward higher electron energy values.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"492 - 497"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. S. Lukasov, F. Yu. Solomkin, N. V. Sharenkova, S. V. Novikov, V. V. Klechkovskaya
{"title":"Thermal Diffusion of Copper into Chromium Disilicide","authors":"M. S. Lukasov, F. Yu. Solomkin, N. V. Sharenkova, S. V. Novikov, V. V. Klechkovskaya","doi":"10.1134/S1063774526601371","DOIUrl":"10.1134/S1063774526601371","url":null,"abstract":"<p>The microstructure, elemental and phase composition of the interface zone between chromium disilicide and copper were studied on three samples: when copper was chemically deposited on CrSi<sub>2</sub> and when samples were obtained by fusing single-crystal and briquetted CrSi<sub>2</sub> into copper.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"474 - 480"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}