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Controlling the Luminescence of Quantum Dots in Hybrid Structures Based on Porous Silicon
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824100259
I. S. Kriukova, E. A. Granizo, A. A. Knysh, P. S. Samokhvalov, I. R. Nabiev
{"title":"Controlling the Luminescence of Quantum Dots in Hybrid Structures Based on Porous Silicon","authors":"I. S. Kriukova,&nbsp;E. A. Granizo,&nbsp;A. A. Knysh,&nbsp;P. S. Samokhvalov,&nbsp;I. R. Nabiev","doi":"10.1134/S1063778824100259","DOIUrl":"10.1134/S1063778824100259","url":null,"abstract":"<p>Resonant cavities based on porous silicon (pSi) are of interest as a basis for hybrid photoluminescent (PL) systems from the viewpoints of both fundamental and applied research. One of the most promising fluorophores for creating such hybrid systems is semiconductor quantum dots (QD), due to their narrow PL spectra and broad absorption spectra. Depending on the structure and parameters of a hybrid system, polariton states can be created and the PL properties of the embedded fluorophores can be modified. This work describes a 4.4-fold narrowing of the PL spectrum of CdSe/ZnS semiconductor quantum dots (core/shell) and a 3.7-fold acceleration of spontaneous emission in pSi microcavities, relative to similar parameters of QDs in a solution. The observed changes in the PL properties of QDs are attributed to the interaction of light and matter between the microcavity eigenmode and the QD excitons. The obtained results pave the way for developing new photonic and optoelectronic devices.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1750 - 1753"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CaCO3 Microparticle-Based Carriers: Optimization of BSA Loading by Coprecipitation
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824100041
L. Biny, D. Kalenichenko, I. Nabiev, A. Sukhanova
{"title":"CaCO3 Microparticle-Based Carriers: Optimization of BSA Loading by Coprecipitation","authors":"L. Biny,&nbsp;D. Kalenichenko,&nbsp;I. Nabiev,&nbsp;A. Sukhanova","doi":"10.1134/S1063778824100041","DOIUrl":"10.1134/S1063778824100041","url":null,"abstract":"<p>Oncological diseases, constituting a major global cause of death, require more selective treatments to minimize side effects. Immunotherapy using antibodies targeting immune checkpoints is a promising approach, but it is limited by poor tumor penetration and treatment resistance of cancer cells. The use of biocompatible and biodegradable calcium carbonate microparticles as drug carriers offers a solution due to their capacity for encapsulation of biomolecules and control of their release, which increase the therapeutic efficacy while reducing side effects. Our study was aimed at optimizing the synthesis of calcium carbonate microparticles and improving the loading of bovine serum albumin, used as a model protein, into them by means of coprecipitation. The approaches developed here make it possible to obtain protein carriers with advanced morphological characteristics and with a loading efficiency of more than 90%.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1736 - 1739"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Search for Neutrino–Gravitational Correlations on the OGRAN and BUST Underground Detectors
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824090230
S. I. Oreshkin, Yu. M. Gavrilyuk, A. V. Gusev, N. L. Kvashnin, A. A. Lugovoy, S. M. Popov, N. V. Rudenko, V. V. Semenov, I. A. Syrovatsky
{"title":"Search for Neutrino–Gravitational Correlations on the OGRAN and BUST Underground Detectors","authors":"S. I. Oreshkin,&nbsp;Yu. M. Gavrilyuk,&nbsp;A. V. Gusev,&nbsp;N. L. Kvashnin,&nbsp;A. A. Lugovoy,&nbsp;S. M. Popov,&nbsp;N. V. Rudenko,&nbsp;V. V. Semenov,&nbsp;I. A. Syrovatsky","doi":"10.1134/S1063778824090230","DOIUrl":"10.1134/S1063778824090230","url":null,"abstract":"<p>The strategy for detecting collapsing stars in the Galaxy using a pair of instruments including the OGRAN optoacoustic gravitational detector and the BUST neutrino scintillation telescope, located in the ground laboratories of the Baksan Neutrino Observatory, Institute for Nuclear Research, Russian Academy of Sciences, is discussed. A key element of the strategy is the search for correlated responses from both detectors, the so-called search for neutrino-gravitational correlations. The efficiency of various algorithms for joint data processing, including analysis of the CH1987A event, is assessed. The processing technique is illustrated using the current output signals of the mentioned instruments.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1703 - 1712"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyzing 3D Nanostructures of Biological Materials and Objects via Scanning- and Optical-Probe Nanotomography
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824100107
A. E. Efimov, O. I. Agapova, I. I. Agapov
{"title":"Analyzing 3D Nanostructures of Biological Materials and Objects via Scanning- and Optical-Probe Nanotomography","authors":"A. E. Efimov,&nbsp;O. I. Agapova,&nbsp;I. I. Agapov","doi":"10.1134/S1063778824100107","DOIUrl":"10.1134/S1063778824100107","url":null,"abstract":"<p>The authors consider current ways of studying the 3D nanostructure of  biomaterials and biological objects based on scanning probe nanotomography—a combination of fluorescence microscopy, probe microscopy, and ultramicrotomy. Results are presented from experiments to study the 3D nanostructure of composite scaffolds based on <i>Bombyx mori</i> silk fibroin and microparticles of an extracellular matrix obtained from decellularized liver tissue. Such scaffolds have great potential for using in regenerative medicine. It is shown that probe nanotomography allows effective analysis of the 3D nanostructure of microinclusions and their morphological parameters that influence the biological activity of products.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1740 - 1743"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of Synchrotron Beam Orbit Correction Software
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824090229
I. Yu. Nikolaichuk, G. S. Sedykh, V. L. Smirnov, M. M. Shandov
{"title":"Features of Synchrotron Beam Orbit Correction Software","authors":"I. Yu. Nikolaichuk,&nbsp;G. S. Sedykh,&nbsp;V. L. Smirnov,&nbsp;M. M. Shandov","doi":"10.1134/S1063778824090229","DOIUrl":"10.1134/S1063778824090229","url":null,"abstract":"<p>Accelerator complexes with a chain of accelerators have been created in recent years for solving relevant problems of particle physics and application research. These chains consist of accelerators for intermediate energies, the main accelerator for project beam parameters, experimental stations, and beam transfer channels. Operation with a synchrotron accelerator requires the correction of a closed beam orbit. Automatic software is developed for this purpose. The main features of software development for beam orbit correction in ring accelerators and colliders are described for the NICA complex booster synchrotron as an example. Multipurpose methods have been used for general application in beam orbit correction systems.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1636 - 1639"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative Characteristics of Catalytically Active MoSx Films in the Hydrogen Evolution Reaction on a MoSx/WSe2 Heterojunction Photocathode
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824090333
O. V. Rubinkovskaya, R. I. Romanov, D. V. Fominski, V. N. Nevolin, Huali Jiang, V. Yu. Fominski
{"title":"Comparative Characteristics of Catalytically Active MoSx Films in the Hydrogen Evolution Reaction on a MoSx/WSe2 Heterojunction Photocathode","authors":"O. V. Rubinkovskaya,&nbsp;R. I. Romanov,&nbsp;D. V. Fominski,&nbsp;V. N. Nevolin,&nbsp;Huali Jiang,&nbsp;V. Yu. Fominski","doi":"10.1134/S1063778824090333","DOIUrl":"10.1134/S1063778824090333","url":null,"abstract":"<p>The method of pulsed laser deposition (PLD) has attracted increasing attention as a promising approach for optimizing catalysts to enhance their efficiency in various applications. One of the current challenges is the simple and controllable synthesis of materials based on transition metal chalcogenides (in particular, MoS<sub><i>x</i></sub>), which can exhibit an increased electrocatalytic activity in the hydrogen evolution reaction. Changes in the chemical states of sulfur and molybdenum as a result of photoelectrochemical tests are studied in this work. By varying the laser fluence and buffer gas pressure, deposition regimes have been determined that result in catalytic layers with minimal substoichiometric states, which are responsible for shifting the Fermi level to the conduction band edge. Combining experimental results and DFT calculations, catalytically active sites on the film surfaces have been identified.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1614 - 1620"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculating the Response of a High-Temperture Superconductor to Microsecond Current Pulses with Allowance for Heating
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824100296
A. N. Maksimova, A. N. Moroz, S. V. Pokrovskij, I. A. Rudnev, V. A. Kashurnikov
{"title":"Calculating the Response of a High-Temperture Superconductor to Microsecond Current Pulses with Allowance for Heating","authors":"A. N. Maksimova,&nbsp;A. N. Moroz,&nbsp;S. V. Pokrovskij,&nbsp;I. A. Rudnev,&nbsp;V. A. Kashurnikov","doi":"10.1134/S1063778824100296","DOIUrl":"10.1134/S1063778824100296","url":null,"abstract":"<p>Monte Carlo (MC) calculations are made for a two-dimensional model of a layered HTS. The strength of the electric field is calculated for samples subjected to rectangular pulses of current with amplitudes exceeding the critical value. The model considers the heating of the sample caused by the flow of current. Calculations are made for different strengths of magnetic fields and amplitudes of pulse currents. The effect an external magnetic field has on the shape of the response of a superconductor to a rectangular current pulse is determined.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1682 - 1688"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Formation of a Nickel Alloy Powder Coating on Thin-Walled Tubes by High-Speed Laser Cladding
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824090114
E. S. Ermilova, I. R. Ovsyankin, A. A. Gavrikov, V. N. Petrovskiy, P. S. Dzhumaev, V. I. Polsky
{"title":"Formation of a Nickel Alloy Powder Coating on Thin-Walled Tubes by High-Speed Laser Cladding","authors":"E. S. Ermilova,&nbsp;I. R. Ovsyankin,&nbsp;A. A. Gavrikov,&nbsp;V. N. Petrovskiy,&nbsp;P. S. Dzhumaev,&nbsp;V. I. Polsky","doi":"10.1134/S1063778824090114","DOIUrl":"10.1134/S1063778824090114","url":null,"abstract":"<p>A 1350-00 nickel alloy powder coating has been deposited on thin-walled 12Kh18N10T stainless steel tubes by high-speed laser cladding. Cladding has been performed using cw radiation from a 10-kW ytterbium fiber laser on a robotic complex. The shapes of the gas–powder jet for Fraunhofer nozzles have been determined. The influence of the laser radiation power and the amount of supplied powder on the structure of the coatings obtained has been evaluated. Metallographic studies of the obtained samples have been carried out. It has been shown that laser cladding under optimal conditions provides an almost nonporous coating with minimal penetration of the base material, ensuring metallurgical fusion. According to the X-ray spectral microanalysis, the chemical composition of the deposited coating hardly differs from the chemical composition of the used powder. The thickness of the deposited layer is adjusted within 100–300 µm in one pass, depending on the deposition modes. The fusion line is identical in structure, which shows a high uniformity of heat input during cladding. The size of the region of thermal influence in the substrate material varies within 50–200 µm, depending on the deposition modes.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1713 - 1721"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improving the Reliability of Splined Joints During Laser Quenching
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824090059
V. P. Biryukov
{"title":"Improving the Reliability of Splined Joints During Laser Quenching","authors":"V. P. Biryukov","doi":"10.1134/S1063778824090059","DOIUrl":"10.1134/S1063778824090059","url":null,"abstract":"<p>The process of laser hardening of 42KhN2MA steel samples using continuous radiation and transverse beam vibrations at a frequency of 223 Hz has been considered. The influence of processing modes on the response parameters of the system and the depth and width of the laser quenching regions has been determined. It has been shown that the use of transverse beam vibrations increases the microhardness, the area of the hardened layer, and its uniformity and preserves the geometric shape of the slot profile compared to processing with a defocused beam. The wear resistance of the laser-hardened regions is significantly higher than the base material.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1696 - 1702"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for Assessing the Optical Properties of Multilayer Tissues of the Gastrointestinal Tract ex Vivo
IF 0.3 4区 物理与天体物理
Physics of Atomic Nuclei Pub Date : 2025-02-22 DOI: 10.1134/S1063778824100247
A. A. Krivetskaya, T. A. Savelieva, D. M. Kustov, V. V. Levkin, S. S. Kharnas, I. D. Romanishkin, V. B. Loschenov
{"title":"Method for Assessing the Optical Properties of Multilayer Tissues of the Gastrointestinal Tract ex Vivo","authors":"A. A. Krivetskaya,&nbsp;T. A. Savelieva,&nbsp;D. M. Kustov,&nbsp;V. V. Levkin,&nbsp;S. S. Kharnas,&nbsp;I. D. Romanishkin,&nbsp;V. B. Loschenov","doi":"10.1134/S1063778824100247","DOIUrl":"10.1134/S1063778824100247","url":null,"abstract":"<p>This work is devoted to the determination of the tissue optical properties of the organs of the human gastrointestinal tract in the spectral range of 400–620 nm. The diffuse reflection and transmission spectra were measured using a Hitachi U-3400 integrating sphere spectrophotometer. The absorption and reduced scattering coefficients were determined using the inverse adding-doubling method. The obtained results of optical properties were compared with the available literature data.</p>","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"87 11","pages":"1727 - 1729"},"PeriodicalIF":0.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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