Pub Date : 2024-05-13DOI: 10.1134/s0018143924700073
V. K. Kochergin, R. A. Manzhos, N. S. Komarova, A. S. Kotkin, A. G. Krivenko, I. N. Krushinskaya, A. A. Pelmenev
Abstract
A comparative study has been conducted on the cathode electrolysis plasma emission spectra recorded during the plasma-assisted electrochemical exfoliation of black phosphorus and graphite under maximally identical experimental conditions. It has been found that in the case of black phosphorus exfoliation, the concentration of active intermediates (OH radicals and O atoms) in electrolytic plasma is significantly lower than that in the case of the graphite electrode. It has been assumed that this effect is due to the fact that the rate of interaction of the above intermediates with the synthesized phosphorene structures is significantly higher than the rate of interaction with graphene-like particles. This assumption has been confirmed by the detection of a significantly higher oxygen content in the exfoliation products of black phosphorus than the oxygen content in the synthesized carbon nanoparticles.
摘要 在最大程度相同的实验条件下，对黑磷和石墨在等离子体辅助电化学剥离过程中记录的阴极电解等离子体发射光谱进行了比较研究。研究发现，在黑磷剥离的情况下，电解等离子体中活性中间产物（OH 自由基和 O 原子）的浓度明显低于石墨电极。据推测，产生这种效应的原因是上述中间产物与合成磷烯结构的相互作用速率明显高于与类石墨烯颗粒的相互作用速率。通过检测黑磷剥离产物中的氧含量明显高于合成碳纳米颗粒中的氧含量，证实了这一假设。
{"title":"Features of Few-Layer Phosphorene Structure Synthesis by Plasma-Assisted Electrochemical Exfoliation of Black Phosphorus","authors":"V. K. Kochergin, R. A. Manzhos, N. S. Komarova, A. S. Kotkin, A. G. Krivenko, I. N. Krushinskaya, A. A. Pelmenev","doi":"10.1134/s0018143924700073","DOIUrl":"https://doi.org/10.1134/s0018143924700073","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A comparative study has been conducted on the cathode electrolysis plasma emission spectra recorded during the plasma-assisted electrochemical exfoliation of black phosphorus and graphite under maximally identical experimental conditions. It has been found that in the case of black phosphorus exfoliation, the concentration of active intermediates (OH radicals and O atoms) in electrolytic plasma is significantly lower than that in the case of the graphite electrode. It has been assumed that this effect is due to the fact that the rate of interaction of the above intermediates with the synthesized phosphorene structures is significantly higher than the rate of interaction with graphene-like particles. This assumption has been confirmed by the detection of a significantly higher oxygen content in the exfoliation products of black phosphorus than the oxygen content in the synthesized carbon nanoparticles.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"4 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929244","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}
Pub Date : 2024-05-13DOI: 10.1134/s0018143924700085
V. I. Krinichnyi
Abstract
The energy and spin parameters of 3-alkylthiophene oligomers and their composites with aromatic hydrocarbons have been calculated. The coexistence of polarons with different degrees of delocalization in the studied compounds has been identified. It has been revealed that the electronic and spin properties of the composites undergo a periodic change initiated by the interaction of the oligomers with aromatic nanoadditives. The anisotropic parameters of spin Hamiltonians have been obtained for the systems under study, and their high-resolution EPR spectra have been calculated.
{"title":"Spin-Dependent Control of Electronic and Magnetic Properties of 3-Alkylthiophene Oligomers and Their Composites with Aromatic Nanoadditives","authors":"V. I. Krinichnyi","doi":"10.1134/s0018143924700085","DOIUrl":"https://doi.org/10.1134/s0018143924700085","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The energy and spin parameters of 3-alkylthiophene oligomers and their composites with aromatic hydrocarbons have been calculated. The coexistence of polarons with different degrees of delocalization in the studied compounds has been identified. It has been revealed that the electronic and spin properties of the composites undergo a periodic change initiated by the interaction of the oligomers with aromatic nanoadditives. The anisotropic parameters of spin Hamiltonians have been obtained for the systems under study, and their high-resolution EPR spectra have been calculated.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"57 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140929297","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020103
G. L. Sharipov, A. M. Abdrakhmanov, B. M. Gareev, L. R. Yakshembetova
Abstract
The influence of scavengers of the primary water radiolysis products ({text{e}}_{{{text{aq}}}}^{ - }) and the H atom on the spectra and intensity of radioluminescence and photoluminescence of the Tb3+ ion in aqueous solutions of TbCl3 and Tb(NO3)3 is considered. The effect of activation of Tb3+ radioluminescence in the presence of H scavengers has been revealed, indicating the presence of a specific (Tb3+)* quenching reaction by this radiolysis product, which is inhibited by its scavengers. Enhancement in the activation has been revealed in the joint presence of H and ({text{e}}_{{{text{aq}}}}^{ - }) scavengers in the solution, with a similar effect of activation of Tb3+ radioluminescence being previously established for ({text{e}}_{{{text{aq}}}}^{ - }) scavengers.
{"title":"On the Specific Quenching of Radioluminescence of Tb3+ Ions in Aqueous Solutions by Hydrogen Atom","authors":"G. L. Sharipov, A. M. Abdrakhmanov, B. M. Gareev, L. R. Yakshembetova","doi":"10.1134/s0018143924020103","DOIUrl":"https://doi.org/10.1134/s0018143924020103","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of scavengers of the primary water radiolysis products <span>({text{e}}_{{{text{aq}}}}^{ - })</span> and the H atom on the spectra and intensity of radioluminescence and photoluminescence of the Tb<sup>3+</sup> ion in aqueous solutions of TbCl<sub>3</sub> and Tb(NO<sub>3</sub>)<sub>3</sub> is considered. The effect of activation of Tb<sup>3+</sup> radioluminescence in the presence of H scavengers has been revealed, indicating the presence of a specific (Tb<sup>3+</sup>)* quenching reaction by this radiolysis product, which is inhibited by its scavengers. Enhancement in the activation has been revealed in the joint presence of H and <span>({text{e}}_{{{text{aq}}}}^{ - })</span> scavengers in the solution, with a similar effect of activation of Tb<sup>3+</sup> radioluminescence being previously established for <span>({text{e}}_{{{text{aq}}}}^{ - })</span> scavengers.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634240","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020115
L. S. Shibryaeva, M. E. Chaplygin, E. V. Zhalnin, N. D. Blinov, A. G. Aksenov
Abstract
This review is devoted to a problem of the impact of low-frequency electromagnetic fields on the productivity of plant seeds. The work discusses the patterns of manifestation of a magnetobiological effect when irradiating seeds, considers the basic laws underlying magnetobiological effects, and discusses the cause-and-effect relationships between the mechanisms and parameters of the action of electromagnetic fields on plants on one hand and the composition of mineral substances and the cellular structure of seeds on the other hand. Based on an analysis of the results of laboratory tests carried out in the fields and in scientific laboratories for the presowing treatment of seeds of various grain and vegetable crops, it is shown that a strict correspondence of the mechanism and kinetics of energy impact with the energy susceptibility of a living plant organism at macromolecular and molecular levels is among the main factors determining the growth of seed germination and the subsequent development into an adult organism.
{"title":"Influence of Electromagnetic Fields on Seed Productivity","authors":"L. S. Shibryaeva, M. E. Chaplygin, E. V. Zhalnin, N. D. Blinov, A. G. Aksenov","doi":"10.1134/s0018143924020115","DOIUrl":"https://doi.org/10.1134/s0018143924020115","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This review is devoted to a problem of the impact of low-frequency electromagnetic fields on the productivity of plant seeds. The work discusses the patterns of manifestation of a magnetobiological effect when irradiating seeds, considers the basic laws underlying magnetobiological effects, and discusses the cause-and-effect relationships between the mechanisms and parameters of the action of electromagnetic fields on plants on one hand and the composition of mineral substances and the cellular structure of seeds on the other hand. Based on an analysis of the results of laboratory tests carried out in the fields and in scientific laboratories for the presowing treatment of seeds of various grain and vegetable crops, it is shown that a strict correspondence of the mechanism and kinetics of energy impact with the energy susceptibility of a living plant organism at macromolecular and molecular levels is among the main factors determining the growth of seed germination and the subsequent development into an adult organism.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"18 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634145","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020061
I. R. Mardaleishvili, A. S. Tatikolov, L. S. Kol’tsova, O. N. Krutius, A. I. Shienok, N. L. Zaichenko
Abstract
The spectral and luminescent properties of solutions of bis(hydroxyphenylazomethine)s (I and II) and bis(hydroxynaphthylazomethine)s (III and IV) of the benzene and pyridine series in toluene and ethanol have been studied. The keto–enol equilibrium in pyridine azomethine II in the ground state weakly depends on the presence of the pyridine N atom, whereas the influence of pyridine is significant for pyridine azomethine IV. In solutions of I and II in both solvents, two luminescence bands are observed from the enol (E*) and (K*) keto forms, the ratio of which depends on the excitation wavelength. Luminescence in solutions of III and IV is determined by the formation of K*, and predominant short-wavelength luminescence from E* is added to the luminescence spectrum only in a solution of III in toluene in the case of short-wavelength excitation. The solvent and the pyridine atom were found to affect the position of the emission bands, with the influence being more pronounced for compound II than for IV. For all compounds I–IV, luminescence in alcohol is an order of magnitude more intense than in toluene.
摘要 研究了苯系列和吡啶系列的双（羟基苯基偶氮甲烷）（I 和 II）和双（羟基萘基偶氮甲烷）（III 和 IV）在甲苯和乙醇中溶液的光谱和发光特性。吡啶偶氮甲烷 II 在基态时的酮烯醇平衡微弱地依赖于吡啶 N 原子的存在，而吡啶对吡啶偶氮甲烷 IV 的影响则很大。在 I 和 II 在两种溶剂中的溶液中，可以观察到来自烯醇（E*）和（K*）酮形式的两条发光带，其比例取决于激发波长。III 和 IV 溶液中的发光是由 K* 的形成决定的，只有在 III 的甲苯溶液中，在短波长激发的情况下，E* 的主要短波长发光才会加入到发光光谱中。溶剂和吡啶原子会影响发射带的位置，对化合物 II 的影响比对化合物 IV 更明显。对于所有化合物 I-IV，在酒精中的发光强度比在甲苯中的高一个数量级。
{"title":"Spectral and Luminescent Properties of Bis(hydroxyazomethine)s of Angular Structure","authors":"I. R. Mardaleishvili, A. S. Tatikolov, L. S. Kol’tsova, O. N. Krutius, A. I. Shienok, N. L. Zaichenko","doi":"10.1134/s0018143924020061","DOIUrl":"https://doi.org/10.1134/s0018143924020061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The spectral and luminescent properties of solutions of bis(hydroxyphenylazomethine)s (I and II) and bis(hydroxynaphthylazomethine)s (III and IV) of the benzene and pyridine series in toluene and ethanol have been studied. The keto–enol equilibrium in pyridine azomethine II in the ground state weakly depends on the presence of the pyridine N atom, whereas the influence of pyridine is significant for pyridine azomethine IV. In solutions of I and II in both solvents, two luminescence bands are observed from the enol (E*) and (K*) keto forms, the ratio of which depends on the excitation wavelength. Luminescence in solutions of III and IV is determined by the formation of K*, and predominant short-wavelength luminescence from E* is added to the luminescence spectrum only in a solution of III in toluene in the case of short-wavelength excitation. The solvent and the pyridine atom were found to affect the position of the emission bands, with the influence being more pronounced for compound II than for IV. For all compounds I–IV, luminescence in alcohol is an order of magnitude more intense than in toluene.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"53 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634279","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020073
E. Nurullaev, L. L. Khimenko, S. R. Allayarov
Abstract
The effect of γ-radiation dose on the mechanical characteristics and structure of a polymer composite material based on PDI-3B and SKD-KTR low-molecular-mass rubbers and filled with potassium chloride has been studied. It has been shown that an increase in the radiation dose to 200 kGy does not lead to a significant change in ultimate tensile stress and strain. The radiation resistance of the synthesized polymer composite materials is also evidenced by the absence of significant changes in the structure of the irradiated composite.
{"title":"Stress–Strain Properties and Structural Characteristics of a Gamma-Irradiated Polymer Composite Material Based on Low-Molecular-Mass Rubbers","authors":"E. Nurullaev, L. L. Khimenko, S. R. Allayarov","doi":"10.1134/s0018143924020073","DOIUrl":"https://doi.org/10.1134/s0018143924020073","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of γ-radiation dose on the mechanical characteristics and structure of a polymer composite material based on PDI-3B and SKD-KTR low-molecular-mass rubbers and filled with potassium chloride has been studied. It has been shown that an increase in the radiation dose to 200 kGy does not lead to a significant change in ultimate tensile stress and strain. The radiation resistance of the synthesized polymer composite materials is also evidenced by the absence of significant changes in the structure of the irradiated composite.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"101 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634111","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020024
A. Athique Ahmed, Ancy Kurian, S. Abima, S. Sumathi
Abstract
This research work presents the synthesis and characterization of CeO2 coupled CePO4 nanocomposites using a hydrothermal technique to examine the coupled composites photocatalytic activity. Stru-ctural, optical and morphological characteristics of the compounds were analysed using XRD, FTIR, UV-DRS, PL, SEM, and EDS techniques. Rietveld refinement provided valuable insights into their structural properties. A 3D model was constructed to illustrate the successful coupling of CeO2 and CePO4. The photocatalytic performance of CePO4 was significantly increased by coupling with CeO2, and the C70 (70 : 30 weight ratio of CeO2 and CePO4) composite exhibited the highest degradation efficiency for RhB and MO dyes. Reactive oxygen species analysis was conducted to attribute the mechanism of the coupled composite. Furthermore, the synthesized composites demonstrated excellent specificity, stability, and reusability.
{"title":"Effect of CeO2 Coupling on the Structural, Optical and Photocatalytic Performance of CePO4 Nanoparticles","authors":"A. Athique Ahmed, Ancy Kurian, S. Abima, S. Sumathi","doi":"10.1134/s0018143924020024","DOIUrl":"https://doi.org/10.1134/s0018143924020024","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This research work presents the synthesis and characterization of CeO<sub>2</sub> coupled CePO<sub>4</sub> nanocomposites using a hydrothermal technique to examine the coupled composites photocatalytic activity. Stru-ctural, optical and morphological characteristics of the compounds were analysed using XRD, FTIR, UV-DRS, PL, SEM, and EDS techniques. Rietveld refinement provided valuable insights into their structural properties. A 3D model was constructed to illustrate the successful coupling of CeO<sub>2</sub> and CePO<sub>4</sub>. The photocatalytic performance of CePO<sub>4</sub> was significantly increased by coupling with CeO<sub>2</sub>, and the C70 (70 : 30 weight ratio of CeO<sub>2</sub> and CePO<sub>4</sub>) composite exhibited the highest degradation efficiency for RhB and MO dyes. Reactive oxygen species analysis was conducted to attribute the mechanism of the coupled composite. Furthermore, the synthesized composites demonstrated excellent specificity, stability, and reusability.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"38 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634263","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020097
A. A. Saifutdinova, A. R. Mardeev, A. A. Galiev, N. P. Germanov, A. I. Saifutdinov
Abstract
The filamentation dynamics of a nitrogen pulsed microwave discharge generated at the antinode of a standing electromagnetic wave at a pressure of 100 torr has been numerically simulated. The results of the dynamics of the main plasma parameters, such as the concentration of charged and excited species, gas temperature, and vibrational temperature of nitrogen, are presented.
{"title":"Filamentation Dynamics of High-Pressure Microwave Discharge in Nitrogen","authors":"A. A. Saifutdinova, A. R. Mardeev, A. A. Galiev, N. P. Germanov, A. I. Saifutdinov","doi":"10.1134/s0018143924020097","DOIUrl":"https://doi.org/10.1134/s0018143924020097","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The filamentation dynamics of a nitrogen pulsed microwave discharge generated at the antinode of a standing electromagnetic wave at a pressure of 100 torr has been numerically simulated. The results of the dynamics of the main plasma parameters, such as the concentration of charged and excited species, gas temperature, and vibrational temperature of nitrogen, are presented.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634330","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020048
M. V. Gapanovich, E. V. Rabenok, E. N. Koltsov, V. V. Rakitin, V. A. Gevorgyan, D. S. Lutsenko
Abstract
The structure of CdTe–Sb2Te3 and CdTe–CdSb solid solutions (0–1019 Sb atoms cm–3) prepared by multistage solid-state synthesis from the elements has been studied. It has been found that the introduction of antimony Sb3+ and Sb3− into cadmium telluride leads to a decrease and increase in the unit cell volume, respectively. It has been shown that the crystal lattice parameters gradually change up to an antimony concentration of 1018 atoms cm–3 in both systems, whereas an increase in the antimony concentration above 1018 Sb atoms cm–3 is characterized by an abrupt change in the unit cell volume due to a significant change in the structure. The decay kinetics of current carriers has been studied by the time-resolved microwave photoconductivity method. It has been found that the introduction of antimony into CdTe in a threshold concentration (1018 Sb atoms cm–3) leads to an increase in the lifetime of photogenerated current carriers; this fact can be attributed to the formation of defect associates and the occurrence of a self-compensation process during doping.
{"title":"Studying the Structure and Lifetime of Photogenerated Current Carriers of Cadmium Telluride-Based Solid Solutions in CdTe–Sb2Te3 and CdTe–CdSb Systems","authors":"M. V. Gapanovich, E. V. Rabenok, E. N. Koltsov, V. V. Rakitin, V. A. Gevorgyan, D. S. Lutsenko","doi":"10.1134/s0018143924020048","DOIUrl":"https://doi.org/10.1134/s0018143924020048","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The structure of CdTe–Sb<sub>2</sub>Te<sub>3</sub> and CdTe–CdSb solid solutions (0–10<sup>19</sup> Sb atoms cm<sup>–3</sup>) prepared by multistage solid-state synthesis from the elements has been studied. It has been found that the introduction of antimony Sb<sup>3+</sup> and Sb<sup>3−</sup> into cadmium telluride leads to a decrease and increase in the unit cell volume, respectively. It has been shown that the crystal lattice parameters gradually change up to an antimony concentration of 10<sup>18</sup> atoms cm<sup>–3</sup> in both systems, whereas an increase in the antimony concentration above 10<sup>18</sup> Sb atoms cm<sup>–3</sup> is characterized by an abrupt change in the unit cell volume due to a significant change in the structure. The decay kinetics of current carriers has been studied by the time-resolved microwave photoconductivity method. It has been found that the introduction of antimony into CdTe in a threshold concentration (10<sup>18</sup> Sb atoms cm<sup>–3</sup>) leads to an increase in the lifetime of photogenerated current carriers; this fact can be attributed to the formation of defect associates and the occurrence of a self-compensation process during doping.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"67 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634508","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}
Pub Date : 2024-04-21DOI: 10.1134/s0018143924020139
M. Yu. Tashmetov, N. B. Ismatov, S. V. Demidov, S. R. Allayarov
Abstract
The chemical composition of the surface of a γ-irradiated ethylene–tetrafluoroethylene copolymer has been studied by XPS. The survey XPS spectrum of the initial and radiolyzed copolymer exhibits peaks attributed to fluorine, carbon, and oxygen atoms. Analysis of C 1s photoelectrons has shown that the relative intensity of the peak characteristic of the –CF2 group decreases in the irradiated copolymer. The fact that the amount of the CF2 group decreases during radiolysis has been also confirmed by a decrease in the intensity of the peak in the F 1s spectrum after irradiation. It has been shown that the carbon content in the irradiated copolymer increases; this finding suggests that the copolymer surface undergoes radiation-induced carbonization. The O 1s spectrum exhibits an intense peak characteristic of groups containing a C–O bond. An increase in the peak intensity with the radiation dose suggests that the copolymer surface undergoes significant radiation-induced oxidation to form oxygen-containing groups. The appearance of signals of the C=O and C=C bonds in the Raman spectra also indicates the radiation-induced oxidation and carbonization of the irradiated copolymer chain.
{"title":"X-Ray Photoelectron Spectroscopy and Raman Spectroscopy Studies of the Gamma-Irradiated Ethylene–Tetrafluoroethylene Copolymer","authors":"M. Yu. Tashmetov, N. B. Ismatov, S. V. Demidov, S. R. Allayarov","doi":"10.1134/s0018143924020139","DOIUrl":"https://doi.org/10.1134/s0018143924020139","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The chemical composition of the surface of a γ-irradiated ethylene–tetrafluoroethylene copolymer has been studied by XPS. The survey XPS spectrum of the initial and radiolyzed copolymer exhibits peaks attributed to fluorine, carbon, and oxygen atoms. Analysis of C 1<i>s</i> photoelectrons has shown that the relative intensity of the peak characteristic of the –CF<sub>2</sub> group decreases in the irradiated copolymer. The fact that the amount of the CF<sub>2</sub> group decreases during radiolysis has been also confirmed by a decrease in the intensity of the peak in the F 1<i>s</i> spectrum after irradiation. It has been shown that the carbon content in the irradiated copolymer increases; this finding suggests that the copolymer surface undergoes radiation-induced carbonization. The O 1s spectrum exhibits an intense peak characteristic of groups containing a C–O bond. An increase in the peak intensity with the radiation dose suggests that the copolymer surface undergoes significant radiation-induced oxidation to form oxygen-containing groups. The appearance of signals of the C=O and C=C bonds in the Raman spectra also indicates the radiation-induced oxidation and carbonization of the irradiated copolymer chain.</p>","PeriodicalId":12893,"journal":{"name":"High Energy Chemistry","volume":"53 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634343","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}
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