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Functionalization of Graphene-Nanotube Nanostructures by BaO Nanoparticles for Field Emission Devices
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167625600075
O. E. Glukhova, M. M. Slepchenkov, E. P. Kitsyuk, Yu. P. Shaman, A. Yu. Gerasimenko
{"title":"Functionalization of Graphene-Nanotube Nanostructures by BaO Nanoparticles for Field Emission Devices","authors":"O. E. Glukhova,&nbsp;M. M. Slepchenkov,&nbsp;E. P. Kitsyuk,&nbsp;Yu. P. Shaman,&nbsp;A. Yu. Gerasimenko","doi":"10.1134/S2635167625600075","DOIUrl":"10.1134/S2635167625600075","url":null,"abstract":"<p>A technology for the functionalization of hybrid nanostructures made of reduced graphene oxide and single-wall carbon nanotubes with BaO nanoparticles is developed. Quantum methods are used to numerically establish the regularities of reducing the work function of hybrid nanostructures. An increase in the emission current of the functionalized hybrid nanostructures by more than 40 times compared to conventional samples is established. Such hybrid nanostructures may be promising for devices with a current density of at least 2 A/cm<sup>2</sup>.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S98 - S106"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crystal Structure of Iron Chloride in Channels of Single-Walled Carbon Nanotubes
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624601268
M. V. Kharlamova, A. S. Kumskov
{"title":"Crystal Structure of Iron Chloride in Channels of Single-Walled Carbon Nanotubes","authors":"M. V. Kharlamova,&nbsp;A. S. Kumskov","doi":"10.1134/S2635167624601268","DOIUrl":"10.1134/S2635167624601268","url":null,"abstract":"<p>The crystal structure of iron chloride in channels of single-walled carbon nanotubes (SWCNTs) is investigated. The channels of SWCNTs with mixed conductivity and a diameter of ~1.4 nm are filled with iron chloride by means of the melt method. On the basis of high-resolution transmission electron microscopy (HRTEM) images, the crystal structure of the encapsulated iron chloride is modeled, and TEM images are produced. It is shown that the encapsulated iron chloride has a one-dimensional structure that differs from the three-dimensional structure with the <span>(Rbar {3}m)</span> space group and the lattice parameters <i>a</i> = 3.5980 Å and <i>c</i> = 17.5360 Å. The filled SWCNTs are investigated via Raman spectroscopy. Modification of the electronic structure of the SWCNTs is revealed. The obtained data are important for applying filled SWCNTs in nanoelectronics, catalysis, sensors, biomedicine, electrochemical energy storage, spintronics, magnetic storage, and magnetic recording.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S124 - S127"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nanoscale Structures of Iron Silicides on NaCl (001) Surface: Self-assembly Synthesis, Morphology, and Optical Properties
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624602225
S. A. Lyaschenko, I. A. Yakovlev, T. A. Andryushchenko, I. V. Nemtsev, S. N. Varnakov, S. G. Ovchinnikov
{"title":"Nanoscale Structures of Iron Silicides on NaCl (001) Surface: Self-assembly Synthesis, Morphology, and Optical Properties","authors":"S. A. Lyaschenko,&nbsp;I. A. Yakovlev,&nbsp;T. A. Andryushchenko,&nbsp;I. V. Nemtsev,&nbsp;S. N. Varnakov,&nbsp;S. G. Ovchinnikov","doi":"10.1134/S2635167624602225","DOIUrl":"10.1134/S2635167624602225","url":null,"abstract":"<p>We have shown a novel method for the synthesis of iron silicide nanoparticles on a water-soluble NaCl substrate using thermal layer-by-layer deposition of Fe–Si and post-annealing in ultra-high vacuum. The crystal structure, morphology and optical properties of highly dispersed Fe–Si-containing thin films have been studied. As a result, Fe<sub>3</sub>Si nanoparticles were found to spontaneously form on the surface of salt with an excess of iron in a wide stoichiometric range. We propose a simple method to control the geometric shape of synthesized Fe–Si ferromagnetic nanoparticles by preparation of NaCl surface.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S45 - S49"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of the Effect of the Type of Precursor and Precipitator on the Structure of Nanoscale Magnesium Carbonate
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624601372
A. V. Blinov, A. O. Senkova, A. A. Gvozdenko, Z. A. Rekhman, M. A. Yasnaya, A. S. Askerova
{"title":"Investigation of the Effect of the Type of Precursor and Precipitator on the Structure of Nanoscale Magnesium Carbonate","authors":"A. V. Blinov,&nbsp;A. O. Senkova,&nbsp;A. A. Gvozdenko,&nbsp;Z. A. Rekhman,&nbsp;M. A. Yasnaya,&nbsp;A. S. Askerova","doi":"10.1134/S2635167624601372","DOIUrl":"10.1134/S2635167624601372","url":null,"abstract":"<p>Within the framework of this work, the influence of the type of precursor and precipitator on the structure of magnesium carbonate is studied. Nanoparticles are obtained by chemical precipitation in an aqueous medium. Magnesium acetate, magnesium nitrate, and magnesium chloride are used as the precursors of magnesium, and potassium carbonate, ammonium carbonate, and sodium carbonate are used as the precipitators. The obtained samples are examined by X-ray diffraction analysis, scanning electron microscopy, and infrared (IR) spectroscopy. It is established that magnesium acetate and ammonium carbonate are optimal precursors and precipitators for the production of magnesium carbonate nanoparticles, respectively, since the particles in this sample have a diameter from 40 to 100 nm. As a result of X-ray diffraction analysis, it is found that three phases of substances are present in the resulting sample: anhydrous magnesium carbonate, Mg<sub>2</sub>(CO<sub>3</sub>)(OH)<sub>2</sub>·3H<sub>2</sub>O, and magnesium oxide.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S146 - S151"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Contact Systems for High-Temperature Thermoelements Containing Nanocomposite Damping Layers
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624600822
A. O. Kozlov, Yu. I. Shtern, E. P. Korchagin, D. G. Gromov, M. Yu. Shtern, M. S. Rogachev
{"title":"Contact Systems for High-Temperature Thermoelements Containing Nanocomposite Damping Layers","authors":"A. O. Kozlov,&nbsp;Yu. I. Shtern,&nbsp;E. P. Korchagin,&nbsp;D. G. Gromov,&nbsp;M. Yu. Shtern,&nbsp;M. S. Rogachev","doi":"10.1134/S2635167624600822","DOIUrl":"10.1134/S2635167624600822","url":null,"abstract":"<p>To compensate for thermal stresses in high-temperature thermoelements (TEs), contact systems (CSs) are developed. These CSs contain nanocomposite damping layers formed by an array of carbon nanotubes (CNTs), in which the channels are partially filled with metal with high electrical conductivity. The CNTs are obtained by catalytic chemical vapor deposition using buffer layers based on Ti–Ni or Co–Nb–N. CNTs up to 7 μm thick are synthesized at a temperature of 700°C for 2 min. In the CSs, a Ni comutation layer up to 15 μm thick is formed on the surface of the CNTs by chemical or electrochemical deposition. Ni is deposited directly onto the CNT surface or onto a preliminarily sputtered Ni layer with a thickness from 100 to 500 nm. As a result, the TE legs with CSs are thermally stable up to 600°C. The CSs have a high adhesion strength up to 9.7 MPa and low specific contact resistance of about 10<sup>–9</sup> Ω m<sup>2</sup>.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S72 - S78"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Synthetic Antiferromagnetic Nanostructures Based on CoFeB/Ru/CoFe
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167625600105
D. V. Vasilyev, D. V. Kostyuk, Yu. V. Kazakov, S. I. Kasatkin, V. V. Amelichev, E. P. Orlov, E. E. Makarova
{"title":"Study of Synthetic Antiferromagnetic Nanostructures Based on CoFeB/Ru/CoFe","authors":"D. V. Vasilyev,&nbsp;D. V. Kostyuk,&nbsp;Yu. V. Kazakov,&nbsp;S. I. Kasatkin,&nbsp;V. V. Amelichev,&nbsp;E. P. Orlov,&nbsp;E. E. Makarova","doi":"10.1134/S2635167625600105","DOIUrl":"10.1134/S2635167625600105","url":null,"abstract":"<p>The characteristics of synthetic antiferromagnetic (SAF) nanostructures CoFeB/Ru/CoFe with a Ru layer thickness corresponding to the second antiferromagnetic (AF) maximum are obtained. The magnetization-reversal curves of SAF structures with a Ru thickness of 2.1, 2.3, and 2.5 nm are studied. The magnetization-reversal curves of CoFeB/Ru/CoFe structures under conditions of their fixation by an AF layer are presented. In addition, the magnetization-reversal curves of spin-tunnel magnetoresistive nanostructures with an AF layer and a SAF structure are presented, and an analysis of the thermal stability of structures with SAF is carried out.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S107 - S111"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of Conformational Integrity and Aggregation Stability of Monoclonal Antibodies and Their Conjugates by Nanodifferential Scanning Fluorimetry
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624602791
D. S. Vinogradova, M. S. Bidzhieva, P. S. Kasatsky, V. S. Burdakov, A. A. Grachev, Zh. Yu. Sidorova, A. S. Spitsyna, A. Paleskava, N. A. Verlov, T. A. Shtam, A. L. Konevega
{"title":"Control of Conformational Integrity and Aggregation Stability of Monoclonal Antibodies and Their Conjugates by Nanodifferential Scanning Fluorimetry","authors":"D. S. Vinogradova,&nbsp;M. S. Bidzhieva,&nbsp;P. S. Kasatsky,&nbsp;V. S. Burdakov,&nbsp;A. A. Grachev,&nbsp;Zh. Yu. Sidorova,&nbsp;A. S. Spitsyna,&nbsp;A. Paleskava,&nbsp;N. A. Verlov,&nbsp;T. A. Shtam,&nbsp;A. L. Konevega","doi":"10.1134/S2635167624602791","DOIUrl":"10.1134/S2635167624602791","url":null,"abstract":"<p>Therapeutic agents based on monoclonal antibodies (mAbs) are successfully used in the diagnostics and treatment of a wide range of infectious and autoimmune diseases, as well as in the combating malignancies. Due to their high specificity, mAbs are used to target signalling or acting agents to a cell of interest in vivo. Thus, radioactively labelled antibodies are among important tools in nuclear medicine. Stringent control of the conformational integrity and aggregation stability of the mAb preparation is critical for successful biotherapeutic development. In this study, we describe the application of nanodifferential scanning fluorimetry (nanoDSF) to obtain a radioactively labelled monoclonal antibody (<sup>161</sup>Tb-DOTA-mAb). Using this method, we optimized the procedure of DOTA-mAb conjugate preparation and determined the storage conditions suitable for subsequent rapid radionuclide labelling of the conjugate.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S202 - S209"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Hydrogen Bonds on the Stability of Nanobubbles in Water
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624602833
Yu. K. Levin
{"title":"Effect of Hydrogen Bonds on the Stability of Nanobubbles in Water","authors":"Yu. K. Levin","doi":"10.1134/S2635167624602833","DOIUrl":"10.1134/S2635167624602833","url":null,"abstract":"<p>A hypothesis, according to which a charged nanobubble in water with an energetically favorable structure is surrounded by a hydrate layer ~1 nm thick with a permittivity equal to ~3, on top of which a diffuse layer is placed, is energetically substantiated. This reduces the capacity of the nanobubble and increases its Coulomb pressure, for example, by 10 times at a radius of 4 nm, counteracting the Laplace pressure and stabilizing the nanobubble. A formula is given for approximating the pressure increase factor with an error of 20% at <i>r</i><sub>0</sub> = 5–60 nm.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S68 - S71"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Resistive State Switching in Led Structures Based on InGaN/GaN
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624602894
L. N. Vostretsova, V. A. Ribenek, D. I. Vostretsov
{"title":"Effect of Resistive State Switching in Led Structures Based on InGaN/GaN","authors":"L. N. Vostretsova,&nbsp;V. A. Ribenek,&nbsp;D. I. Vostretsov","doi":"10.1134/S2635167624602894","DOIUrl":"10.1134/S2635167624602894","url":null,"abstract":"<p>The change in the electrical characteristics of LED structures based on InGaN/GaN caused by high current flow in the pulsed mode is investigated. Stable switching between high-conductive (resistive) and low-conductive (light-emitting) states is discovered, which is accompanied by a change in current transfer mechanisms. The main switching mechanism is considered to be the movement of mobile defects and the formation of conductive filaments (channels) in the space-charge region.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S191 - S194"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of a Capsule for the Targeted Delivery of Active Compounds Based on Metal-Organic Frameworks with a Modified Surface
IF 0.8
Nanotechnologies in Russia Pub Date : 2025-03-24 DOI: 10.1134/S2635167624602845
V. V. Butova, T. V. Bauer, V. A. Polyakov, M. A. Gritsai, T. M. Minkina, Z. B. Namsaraev
{"title":"Synthesis of a Capsule for the Targeted Delivery of Active Compounds Based on Metal-Organic Frameworks with a Modified Surface","authors":"V. V. Butova,&nbsp;T. V. Bauer,&nbsp;V. A. Polyakov,&nbsp;M. A. Gritsai,&nbsp;T. M. Minkina,&nbsp;Z. B. Namsaraev","doi":"10.1134/S2635167624602845","DOIUrl":"10.1134/S2635167624602845","url":null,"abstract":"<p>The aim of this study is to develop nanomaterials based on porous frameworks for the targeted delivery of active compounds. Three metal-organic frameworks (MOFs) ZIF-8, UiO-66-NH<sub>2</sub>, and MIL-100(Fe) are coated with surfactants (SAs) to enhance their bioavailability. The stability of MOFs during modification with SA solutions is studied. Based on data from powder X-ray diffraction and IR spectroscopy, the optimal MOF–SA pairs are identified. The adsorption and desorption dynamics of cationic (methylene blue) and anionic dyes (methyl orange) by the most promising composites are investigated. The obtained results and proposed patterns can be further used for loading active components, such as phytohormones, into MOF pores, considering the specifics of electrostatic interactions and potential binding via functional groups.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":"19 1 supplement","pages":"S128 - S137"},"PeriodicalIF":0.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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