R. R. Jalolov, Z. Sh. Shaymardanov, Sh. Z. Urolov, B. N. Rustamova
{"title":"Effect of Annealing Temperature and Conditions on Photoluminescence Properties of ZnO/P3HT Heterostructures","authors":"R. R. Jalolov, Z. Sh. Shaymardanov, Sh. Z. Urolov, B. N. Rustamova","doi":"10.1007/s10812-026-02149-3","DOIUrl":"10.1007/s10812-026-02149-3","url":null,"abstract":"<p>Zinc oxide nanocrystals were synthesized in aqueous solutions at low temperatures. Their surface was coated with a thin film of the electrically conductive polymer poly(3-hexylthiophene) (P3HT) to form hybrid heterostructures. The synthesized nanostructures and hybrid heterostructures formed on their basis were subjected to heat treatment at various temperatures both in air and in vacuum (10<sup>–5</sup> Pa). Changes in the optical properties of nanostructures and hybrid heterostructures after heat treatment were studied. The emission band corresponding to 0–0 transitions dominated the photoluminescence spectra of ZnO/P3HT heterostructures annealed in air. The photoluminescence spectra were dominated by the emission band corresponding to defects in ZnO and the polymer of heterostructures annealed in vacuum. Heat treatment of heterostructures based on ZnO nanocrystals in air and vacuum at 100°C resulted in an optimal state of the interface layer between ZnO and P3HT polymer.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"783 - 791"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Yu. Bobkova, V. S. Vasil′eva, O. O. Gavrilenko, M. A. Ksenofontov, L. A. Salnikava, E. I. Pavalanski
{"title":"Effect of Gamma Irradiation on the IR Spectra and Mechanical Properties of Composites Derived from Epoxy Resin and Silicon Oxide Nanoparticles","authors":"E. Yu. Bobkova, V. S. Vasil′eva, O. O. Gavrilenko, M. A. Ksenofontov, L. A. Salnikava, E. I. Pavalanski","doi":"10.1007/s10812-026-02152-8","DOIUrl":"10.1007/s10812-026-02152-8","url":null,"abstract":"<p>Composites derived from epoxy resin modified with silicon oxide nanoparticles were studied by spectral and physical-mechanical methods. The effects of the percentage content of the filler and the dose of γ-radiation on the strength of these composites were analyzed. The best procedure for hardening the composites was established. The optimal physical and mechanical characteristics were achieved at 1 mass% filler content and radiation dose 50 kGy. The basic spectral criteria were established to characterize the change in the physical and chemical structure of the composites by the action of γ-radiation. The appearance of IR bands at 1710–1740 cm<sup>–1</sup> and an increase in the intensity of these bands with increasing radiation dose can serve as spectral criteria for greater destruction of the polymer matrix.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"804 - 809"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. B. Bushuk, M. S. Snezhko, I. N. Puchkouski, S. S. Shavel, B. F. Kuntsevich
{"title":"Regularities of Formation of the Visibility Zone by Active-Pulse Vision Systems with a Comparatively Short Duration of Photodetector Exposure","authors":"S. B. Bushuk, M. S. Snezhko, I. N. Puchkouski, S. S. Shavel, B. F. Kuntsevich","doi":"10.1007/s10812-026-02155-5","DOIUrl":"10.1007/s10812-026-02155-5","url":null,"abstract":"<p>A model for forming a range-energy profile (REP) of the visibility zone for an object stationary relative to the system when the duration of the photodetector strobe pulses (exposure time) is significantly shorter than the duration of laser pulses illuminating the objects was proposed. Analytical expressions were derived linking the characteristic distances (points) of the visibility zone REP with the durations of strobe pulses, the uncontrolled technical delay, and the parameters of the laser pulses for different temporal shapes. Numerical calculations confirmed the validity of the obtained analytical expressions. It was established and experimentally confirmed that the REP, taking into account certain patterns, reproduced (displayed) the temporal shape of the laser pulse following from its beginning to its end when moving from the initial point of the visibility zone to the final point.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"824 - 834"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. A. Kulahava, A. V. Bahdanava, N. V. Amaegberi, G. N. Semenkova
{"title":"Influence of Myeloperoxidase and Horseradish Peroxidase on Fluorescence Characteristics of Graphene Quantum Dots","authors":"T. A. Kulahava, A. V. Bahdanava, N. V. Amaegberi, G. N. Semenkova","doi":"10.1007/s10812-026-02153-7","DOIUrl":"10.1007/s10812-026-02153-7","url":null,"abstract":"<p>The fluorescence of graphene quantum dots (GQDs) at various pH values, temperatures, and ionic strengths and in the absence and presence of peroxidases was investigated. Myeloperoxidase and the hypochlorous acid produced by it were found to cause GQD degradation in biological systems. The rate of substrate oxidation by horseradish peroxidase and myeloperoxidase was shown to decrease in the presence of GQDs. Fluorescence, biodegradation, and the ability to be functionalized make GQDs promising components for theranostic platforms.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"810 - 816"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. A. Poklonski, A. V. Khomich, O. N. Poklonskaya, S. A. Vyrko, A. A. Khomich, A. F. Popovich, A. I. Kovalev
{"title":"Raman Scattering and Electron Spin Magnetism Features in Monocrystalline CVD Diamonds Irradiated with Fast Neutrons","authors":"N. A. Poklonski, A. V. Khomich, O. N. Poklonskaya, S. A. Vyrko, A. A. Khomich, A. F. Popovich, A. I. Kovalev","doi":"10.1007/s10812-026-02143-9","DOIUrl":"10.1007/s10812-026-02143-9","url":null,"abstract":"<p>The effect of reactor neutron irradiation on Raman scattering spectra and electron spin resonance (ESR) signals of monocrystalline CVD diamond films is studied. The presence of superparamagnetic clusters of spin radicals (ferrons) — regions of magnetic ordering of uncompensated electron spins (g-factor ≈4.65) in an external magnetic field — is revealed for the first time in neutron-irradiated (fluence 3·10<sup>18</sup> cm<sup>−2</sup>) diamonds. It is established that thermal annealing at 400°C for 1 h drastically reduces the ESR signal intensity of spin-radical associates of radiation defects, while approximately doubles the amplitude of the ESR signal from single paramagnetic centers and narrows its linewidth by a factor of ≈4.6. Raman spectroscopy data indicate partial recovery of the crystal structure of diamond due to the annealing of both single radiation defects and nanoscale amorphized regions (ferrons). The types of defects responsible for the formation of ferrons in diamonds as a result of their irradiation with reactor neutrons are discussed.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"740 - 749"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. V. Kalinovskaya, A. G. Mirochnik, A. N. Zadorozhnaya, L. D. Popov
{"title":"Thermal and Luminescence Properties of Mixed-Ligand Europium(III) Complexes with Dimethoxyphenylacetic Acid","authors":"I. V. Kalinovskaya, A. G. Mirochnik, A. N. Zadorozhnaya, L. D. Popov","doi":"10.1007/s10812-026-02147-5","DOIUrl":"10.1007/s10812-026-02147-5","url":null,"abstract":"<p>The spectral and luminescence characteristics of synthesized europium(III) dimethoxyphenylacetates with nitrogen- and phosphorus-containing ligands were studied. The electronic absorption spectra, luminescence excitation spectra, and the Stark structure of <sup>5</sup>D<sub>0</sub>–<sup>7</sup>F<sub>j</sub> electronic transitions (j = 0–2) in the low-temperature luminescence spectra of europium(III) dimethoxyphenylacetates were analyzed and the quantum yield of the obtained complexes was determined. It was established that excitation energy is transferred to the europium(III) ion from levels of both the dimethoxyphenylacetic acid levels and the nitrogen-containing neutral ligands. The compounds in this study with the greatest thermal stability were identified.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"767 - 774"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fluorescence Sensing of Tryptamine Using 5-Aminofluorescein Functionalized Gold Nanoparticles","authors":"S. D. Anudevi, K. Kumar Ebenezar, Shoba Narayan","doi":"10.1007/s10812-026-02160-8","DOIUrl":"10.1007/s10812-026-02160-8","url":null,"abstract":"<p>This work describes the development of a fluorescence sensor based on citrate-reduced gold nanoparticles (GNPs) conjugated with 5-aminofluorescein (5AF) using EDC/NHS chemistry to create GNP@5AF nanoparticles. These nanoparticles were used to detect tryptamine (TRYP) by measuring changes in fluorescence intensity upon incubation with various TRYP concentrations. The sensor showed efficient fluorescence quenching with good linearity and a detection limit of 4 ng TRYP. The sensor's applicability was tested in biological and food samples. In cheese and banana samples, a linear fluorescence enhancement allowed quantitative determination of TRYP within certain concentration ranges (2–10 ng in cheese and 2–16 ng in banana). However, nonlinear responses in other matrices limited the method's broader application. Interference studies indicated that GNP@5AF had a high selectivity for TRYP compared to other amine-containing molecules. Overall, the GNP@5AF sensor offers a simple and sensitive fluorescence-based method for detecting tryptamine, with potential for food safety monitoring. The study suggests that further optimization with selective ligands could improve sensor performance and analytical robustness.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"872 - 881"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. A. Miskevich, V. A. Loiko, N. A. Loiko, A. G. Smirnov, A. A. Stepanov, E. V. Mukha, A. A. Hubarevich
{"title":"Resonant Absorption of Light by Ordered Two-Dimensional Arrays of Spherical and Cylindrical Nanoparticles in Aluminum Oxide","authors":"A. A. Miskevich, V. A. Loiko, N. A. Loiko, A. G. Smirnov, A. A. Stepanov, E. V. Mukha, A. A. Hubarevich","doi":"10.1007/s10812-026-02142-w","DOIUrl":"10.1007/s10812-026-02142-w","url":null,"abstract":"<p>The absorption of light by two-dimensional arrays of homogeneous spherical and cylindrical nanoparticles in an aluminum oxide matrix under lattice resonance conditions is studied. A semi-analytical statistical method SSM) based on the quasi-crystalline approximation of the theory of multiple scattering of waves is used to model the optical properties of arrays of spherical particles with different types and degrees of order. A numerical finite element method (FEM) is employed to model the optical properties of perfect lattices of cylindrical particles. Calculations for highly ordered imperfect lattices of spherical particles are in excellent agreement with FEM data for perfect lattices of such particles. The spectral dependences of the absorption coefficient of the arrays on the spatial organization, degree of order, size, shape, and concentration of silver, gold, cadmium selenide, and MAPbBr<sub>3</sub> perovskite particles are presented.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"727 - 739"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. V. Bernatskiy, I. I. Draganov, V. V. Lagunov, A. Kh. Sadurni Sorokin, V. N. Ochkin
{"title":"Influence of Discharge Current on the Parameters of Plasma Supported by a Hollow Rectangular Cathode","authors":"A. V. Bernatskiy, I. I. Draganov, V. V. Lagunov, A. Kh. Sadurni Sorokin, V. N. Ochkin","doi":"10.1007/s10812-026-02151-9","DOIUrl":"10.1007/s10812-026-02151-9","url":null,"abstract":"<p>The plasma glow intensity (I), the electron energy distribution function (EEDF), the electron concentration (N<sub>e</sub>), and the average electron energy (〈u〉) were measured as functions of the discharge current and the measurement location in a hollow cathode discharge. The EEDF shape near the hollow cathode was found to depend significantly on the discharge current. It exhibited a bi-Maxwellian shape at a current of 50 mA. A local maximum in the EEDF, the position and amplitude of which changed with increasing discharge current, appeared as the current increased. These changes led to a linear increase in the average electron energy. The electron concentration increased linearly with current changes from 50 to 200 mA, after which the value of N<sub>e</sub> ceased to depend on the discharge current in the range 200–450 mA. The glow intensities of individual He atomic lines depended linearly on the discharge current.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 4","pages":"799 - 803"},"PeriodicalIF":0.7,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149125697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. G. Kuryavyi, I. A. Tkachenko, A. V. Gerasimenko
{"title":"Synthesis of Complex Oxides Under the Influence of Air Plasma from a Pulsed High-voltage Discharge on a Mechanical Mixture of Simple Oxides and Metal Electrodes and Their Magnetic Properties","authors":"V. G. Kuryavyi, I. A. Tkachenko, A. V. Gerasimenko","doi":"10.1007/s10812-026-02141-x","DOIUrl":"10.1007/s10812-026-02141-x","url":null,"abstract":"<p>CuO/Cu<sub>2</sub>O/Y<sub>2</sub>O<sub>3</sub>/Y<sub>2</sub>BaCuO/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.32</sub> composite containing complex oxides was obtained by direct exposure of a powder mixture of Y<sub>2</sub>O<sub>3</sub>, BaO<sub>2</sub>, and CuO to pulsed high-voltage discharge plasma. Annealing this composite at 1173 K yielded a Y<sub>2</sub>BaCuO/CuO/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.91</sub> composite containing the well-known high-temperature superconductor YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.91</sub>. The presence of a superconducting phase in the resulting composite at T < 87 K was confirmed by data obtained on a vibromagnetometer. The NiCr<sub>2</sub>O<sub>4</sub>/NiO/Ni composite was obtained by plasma treatment of nichrome wire electrodes. The synthesized sample exhibited a shift in the magnetic hysteresis loop at low temperature, indicating the presence of ferromagnetic and antiferromagnetic regions in exchange interaction. A monolithic sample containing a Cu<sub>2</sub>O core coated with a CuO shell was obtained by plasma treatment of copper wire. The temperature dependence of the sample's magnetization was characteristic of high-temperature superconductivity. The used plasma-chemical methods are promising for research on the synthesis of new functional materials.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 3","pages":"530 - 536"},"PeriodicalIF":0.7,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}