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A transparent radio frequency shielding coating obtained using a self-organized template / A. S. Voronin, Y. V. Fadeev, I. V. Govorun [et al.] // Tech. Phys. Lett. - 2021. - Vol. 47, Is. 3. - P. 259-262, DOI 10.1134/S1063785021030159. - Cited References: 10 . - ISSN 1063-7850
Кл.слова (ненормированные):
self-organized template -- micromesh coating -- shielding of electromagnetic radiation
Аннотация: We present a simple and affordable technology for producing a thin-film transparent radio-shielding material. The material is a silver micromesh coating produced using a self-organized template. The results of a study of the radio-shielding properties of these coatings in the X and K bands are presented. The micromesh coating with a sheet resistance of 6.8 Ω/sq and integrated optical transmission of 83.6% is characterized by a shielding efficiency of 28.4 dB at a frequency of 8 GHz, which corresponds to a shielding of 99.85% of radiation. Reflection is the main mechanism for shielding radio waves by micromesh coatings.

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Публикация на русском языке Прозрачное радиоэкранирующее покрытие, полученное при помощи самоорганизованного шаблона [Текст] / А. С. Воронин, Ю. В. Фадеев, И. В. Говорун [и др.] // Письма в Журн. техн. физ. - 2021. - Т. 47 Вып. 5. - С. 31-34

Держатели документа:
Federal Research Center Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Voronin, A. S.; Fadeev, Y. V.; Govorun, I. V.; Говорун, Илья Валерьевич; Voloshin, A. S.; Волошин, Александр Сергеевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Simunin, M. M.; Khartov, S. V.
}
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Co/multi-walled carbon nanotubes/polyethylene composites for microwave absorption: Tuning the effectiveness of electromagnetic shielding by varying the components ratio / M. A. Kazakova, N. V. Semikolenova, E. Y. Korovin [et al.] // Compos. Sci. Technol. - 2021. - Vol. 207. - Ст. 108731, DOI 10.1016/j.compscitech.2021.108731. - Cited References: 45. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the state assignment for Boreskov Institute of Catalysis (project # АААА-А21-121011390054-1) . - ISSN 0266-3538
Кл.слова (ненормированные):
Polymer composites -- Multi-walled carbon nanotubes -- Co nanoparticles -- Hybrid structures -- Electromagnetic interference shielding
Аннотация: We present novel polyethylene (PE) composites for electromagnetic interference (EMI) shielding application. They are based on cobalt modified multi-walled carbon nanotubes (MWCNTs) produced via in situ polymerization of ethylene, with the Ti-Ziegler–Natta catalyst preliminarily immobilized on Co/MWCNT hybrids. The electromagnetic properties of the composites were tuned by varying the filler loading and Co:MWCNT ratio. The microstructure of the composites and electromagnetic absorption process were carefully characterized by transmission and scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry, ferromagnetic resonance and vector network analysis. The electromagnetic wave absorbing properties of the nanocomposite were investigated in the 10 MHz−18 GHz frequency range revealing that the EMI absorption properties can be tuned by varying the Co:MWCNT weight ratio in the filler. Interestingly, the Co/MWCNT-PE composite with a total filler and Co loading of only 12 and 1.7 wt%, respectively, showed extremely high reflection loss (RL) of −55 dB. More importantly, an effective bandwidth of 12.8–17.8 GHz (RL below −10 dB) was achieved for a matching thickness of only 1.5 mm. The specific RL value (RL/filler loading) of the composite was superior in comparison with the previously reported nanostructured carbon materials. The highly effective absorbing properties of Co/MWCNT-PE composites are explained primarily by the unprecedented uniform filler distribution in the polyethylene as well as by the synergistic effect of MWCNTs and Co nanoparticles. This approach thus offered an effective strategy to design cost-effective, lightweight and flexible EMI shielding materials with tunable dielectric and magnetic performance.

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Держатели документа:
Boreskov Institute of Catalysis, SB RAS, Lavrentieva 5, Novosibirsk, 630090, Russian Federation
National Research Tomsk State University, Lenin Ave. 36, Tomsk, 634050, Russian Federation
Kirensky Institute of Physics, SB RAS, Akademgorodok St. 50, Krasnoyarsk, 660036, Russian Federation
TOTAL Research and Technology Feluy (TRTF), Zone Industrielle C, Feluy, 7181, Belgium
Soft Matter Science and Engineering (SIMM), UMR CNRS 7615, ESPCI Paris, Universite PSL, Sorbonne Universite, Paris, 75005, France

Доп.точки доступа:
Kazakova, M. A.; Semikolenova, N. V.; Korovin, E. Y.; Zhuravlev, V. A.; Selyutin, A. G.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Moseenkov, S. I.; Andreev, A. S.; Lapina, O. B.; Suslyaev, V. I.; Matsko, M. A.; Zakharov, V. A.; Lacaillerie, J. -B.D.D.
}
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Cu-Ag and Ni-Ag meshes based on cracked template as efficient transparent electromagnetic shielding coating with excellent mechanical performance / A. S. Voronin, Y. V. Fadeev, I. V. Govorun [et al.] // J. Mater. Sci. - 2021. - Vol. 56. Is. 26. - P. 14741-14762, DOI 10.1007/s10853-021-06206-4. - Cited References: 79. - This work was supported by Russian Foundation for Basic Research project «mol_a» № 18-38-00852 and a scholarship from the President of the Russian Federation SP-2235.2019.1. The sputtering Ag seed mesh and physicochemical analysis of materials was carried out on the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» . - ISSN 0022-2461. - ISSN 1573-4803

РУБ Materials Science, Multidisciplinary
Рубрики:
COPPER NANOWIRES
   METALLIC MESH
   PLASTIC SUBSTRATE
   ELECTRODES
   FILMS
Аннотация: Nowadays, the technical advances call for efficient electromagnetic interference (EMI) shielding of transparent devices which may be subject to data theft. We developed Cu–Ag and Ni–Ag meshes on flexible PET substrate for highly efficiency transparent EMI shielding coating. Cu–Ag and Ni–Ag meshes obtained with galvanic deposition of copper and nickel on thin Ag seed mesh which was made by cracked template method. Coefficients S11, S21 and shielding efficiency (SE) were measured for Cu–Ag and Ni–Ag meshes in X-band (8–12 GHz) and K-band (18–26.5 GHz). 90 s copper deposition increase SE from 23.2 to 43.7 dB at 8 GHz with a transparency of 82.2% and a sheet resistance of 0.25 Ω/sq. The achieved maximum SE was 47.6 dB for Cu–Ag mesh with 67.8% transparency and 41.1 dB for Ni–Ag mesh with 77.8% transparency. Cu–Ag and Ni–Ag meshes have high bending and long-term stability. Minimum bend radius is lower than 100 µm. This effect allows to produce different forms of transparent shielding objects, for example, origami method. Our coatings are the leading among all literary solutions in three-dimensional coordinates: of sheet resistance–optical transmittance–cost of produced.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr,FRC KSC SB RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Reshetnev Univ, Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Voronin, A. S.; Fadeev, Y. V.; Govorun, I. V.; Говорун, Илья Валерьевич; Podshivalov, I. V.; Подшивалов, Иван Валерьевич; Simunin, M. M.; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Karpova, D. V.; Smolyarova, T. E.; Смолярова, Татьяна Евгеньевна; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Karacharov, A. A.; Nemtsev, I. V.; Немцев, Иван Васильевич; Khartov, S. V.; Russian Foundation for Basic Research projectRussian Foundation for Basic Research (RFBR) [18-38-00852]; Russian FederationRussian Federation [SP-2235.2019.1]
}
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Low cost embedded copper mesh Based on cracked template for highly durability transparent EMI shielding films / A. S. Voronin, Y. V. Fadeev, M. O. Makeev [et al.] // Materials. - 2022. - Vol. 15, Is. 4. - Ст. 1449, DOI 10.3390/ma15041449. - Cited References: 55. - This research work was supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of state tasks No. 0287-2021-0026 and No. 0705-2020-0032 . - ISSN 1996-1944

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering + Physics, Applied + Physics, Condensed Matter
Рубрики:
PERFORMANCE
   REALIZATION
   ELECTRODE
   NANOMESH
   PATTERN
Кл.слова (ненормированные):
transparent electromagnetic interference (EMI) shielding films -- cracked template -- electroplating -- photocurable resin -- embedded mesh -- durability
Аннотация: Embedded copper mesh coatings with low sheet resistance and high transparency were formed using a low-cost Cu seed mesh obtained with a magnetron sputtering on a cracked template, and subsequent operations electroplating and embedding in a photocurable resin layer. The influence of the mesh size on the optoelectric characteristics and the electromagnetic shielding efficiency in a wide frequency range is considered. In optimizing the coating properties, a shielding efficiency of 49.38 dB at a frequency of 1 GHz, with integral optical transparency in the visible range of 84.3%, was obtained. Embedded Cu meshes have been shown to be highly bending stable and have excellent adhesion strength. The combination of properties and economic costs for the formation of coatings indicates their high prospects for practical use in shielding transparent objects, such as windows and computer monitors.

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Держатели документа:
Russian Acad Sci, Dept Mol Elect, Fed Res Ctr, Krasnoyarsk Sci Ctr,Siberian Branch,FRC,KSC,SB,RA, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Engn & Construct, Krasnoyarsk 660041, Russia.
Bauman Moscow State Syst Univ, Lab EMI Shielding Mat, Moscow 105005, Russia.
Russian Acad Sci, Lab Reinforced Plast, NN Semenov Fed Res Ctr Chem Phys, Moscow 119991, Russia.
Siberian Fed Univ, Sch Nonferrous Met & Mat Sci, Krasnoyarsk 660041, Russia.
Reshetnev Siberian Univ Sci & Technol, Dept Aircraft, Krasnoyarsk 660037, Russia.
Siberian Fed Univ, Sch Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Lab Radiospectroscopy & Spintron, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
Reshetnev Siberian Univ Sci & Technol, Sci & Training Ctr Space Res, Krasnoyarsk 660037, Russia.
Reshetnev Siberian Univ Sci & Technol, High Technol Inst, Krasnoyarsk 660037, Russia.
Tomsk Polytech Univ, Lab Radiat & Plasma Technol, Tomsk 634050, Russia.
Russian Acad Sci, Lab Radiophoton, Siberian Branch, VE Zuev Inst Atmospher Opt, Tomsk 634055, Russia.
Russian Acad Sci, Lab Photon Mol Syst, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
LLC Res & Prod Co Spectehnauka, Krasnoyarsk 660043, Russia.

Доп.точки доступа:
Voronin, Anton S.; Fadeev, Yurii V.; Makeev, Mstislav O.; Mikhalev, Pavel A.; Osipkov, Alexey S.; Provatorov, Alexander S.; Ryzhenko, Dmitriy S.; Yurkov, Gleb Y.; Simunin, Mikhail M.; Karpova, Darina V.; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Kokh, Dieter; Bainov, Dashi D.; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Nedelin, Sergey V.; Zolotovsky, Nikita A.; Khartov, Stanislav V.; Ministry of Science and Higher Education of the Russian Federation [0705-2020-0032]; [0287-2021-0026]
}
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Microstrip rejecting bandstop filter / A. A. Leksikov, A. O. Afonin, A. A. Aleksandrovsky [et al.] // 2022 IEEE International Multi-Conference on Engineering, Computer and Information Sciences, SIBIRCON 2022 : IEEE, 2022. - P. 1200-1203, DOI 10.1109/SIBIRCON56155.2022.10016938. - Cited References: 13
Кл.слова (ненормированные):
microstrip -- BSF -- through line -- resonator -- rejection -- stopband -- substrate -- shielding
Аннотация: The paper is devoted to simulation, designing and fabrication of a microstrip 5-order bandstop rejecting filter. The bandstop filter uses classic schem, e.g. it consists of a microstrip through (common) line whose ends serve input and output ports. In the vicinity of the line a number of microstrip rejecting resonators locate, in our case five S-shaped resonators. They electromagnetically interact with the line, that forces signals, having frequenscies, bieng equal to the resonant ones, to reject (reflect) from a device. Dielectric substrate of the device has thickness 1.0 mm, and other sizes are 44.0×20.0 mm 2 . The filter described in this work has shielding. In a band 1480 MHz …1499 MHz rejection exceeds 50 dB. Transmission bands at a level –2 dB are 0…1437 MHz and 1563 MHz…3000 MHz lower and upper correspondingly. Return loss in the passbands does not exceed –16 dB (VSWR≤1.4). Good agreement is observed between simulated and experimental data. Fabricated filter has small size.

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Держатели документа:
Laboratory of Electrodynamics and Microwave Electronics, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Laboratory of Scientific Instrumentation, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
IITC Research Laboratory, Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Leksikov, A. A.; Лексиков, Александр Александрович; Afonin, A. O.; Афонин, Алексей Олегович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Ugryumov, A. V.; Угрюмов, Андрей Витальевич; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Govorun, I. V.; Говорун, Илья Валерьевич; IEEE International Multi-Conference on Engineering, Computer and Information Sciences 2022(1-13 November 2022 ; Yekaterinburg, Russian Federation)
}
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Original concept of cracked template with controlled peeling of the cells perimeter for high performance transparent EMI shielding films / A. S. Voronin, Y. V. Fadeev, F. S. Ivanchenko [et al.] // Surf. Interfaces. - 2023. - Vol. 38. - Ст. 102793, DOI 10.1016/j.surfin.2023.102793. - Cited References: 73. - The development of the processes of synthesis of a cracked template and conceptualization and optimization parameters peeling cells perimeter of the cracked template for the requirements of the final products were carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation within the framework of state task No. 0287–2021–0026. The development of the processes of the formation of metal films and the study of the structural, optical, electrical and shielding properties of the samples were carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation within the framework of state assignment No. FSFN-2022–0007. The physicochemical analysis of materials was carried out on equipment from the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS». We would like to thank Anastasia Tamarovskaya for the macro photo of thick Ag mesh samples. . - ISSN 2468-0230
Кл.слова (ненормированные):
Transparent conductor -- Cracked template -- Cells perimeter peeling -- EMI shielding films
Аннотация: The problem of sputtering of thick metal films on micro and nanotemplates is important for obtaining mesh transparent conductors with excellent optoelectric characteristics. In this work, we demonstrate for the first time the possibility of controlling the degree of peeling of the cell perimeter from the substrate for a cracked template based on egg white by alternating the operations of moistening the template with saturated water vapor and shock drying with hot air. Local peeling of the cracked template cells perimeter makes it possible to increase the thickness of the metal sputtered on the cracked template by more than 1 µm, which is not achievable for other lithographic approaches. Our technique was used to obtain thick Ag meshes with a low sheet resistance of no more than 1.59 Ω/sq and a transparency of about 89.1%. The thick Ag meshes show a shielding efficiency (SE) of 49 dB or 99.998% of the incident power of an electromagnetic wave at a frequency of 1 GHz. In a sandwich geometry, thick Ag meshes, which simulates a real shielding window, the shielding efficiency (SE) reaches 71 dB with a transparency of more than 80%.

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Держатели документа:
Federal Research Center «Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences» (FRC KSC SB RAS), Krasnoyarsk, Russia 660036
Siberian Federal University, Krasnoyarsk, Russia 660041
Bauman Moscow State Technical University, Moscow Russia 105005
N.N. Semenov Federal Research Center of Chemical Physics of Russian Academy of Sciences, Moscow, Russia 119334
Reshetnev Siberian University Science and Technology, Krasnoyarsk, Russia 660037
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk Russia 660036
LLC Research and Production Company “Spectehnauka”, Krasnoyarsk, Russia 660043
Tomsk Polytechnic University, Tomsk, Russia 634050
V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia 634055

Доп.точки доступа:
Voronin, A. S.; Fadeev, Y. V.; Ivanchenko, F. S.; Dobrosmyslov, S. S.; Makeev, M. O.; Mikhalev, P. A.; Osipkov, A. S.; Damaratsky, I. A.; Ryzhenko, D. S.; Yurkov, G. Y.; Simunin, M. M.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Nedelin, S. V.; Неделин, С. В.; Zolotovsky, N. A.; Золотовский, Н. А.; Bainov, D. D.; Khartov, S. V.
}
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    Thermo-dynamical contours of electronic-vibrational spectra simulated using the statistical quantum-mechanical methods [Text] / V. Pomogaev [et al.] // Theor. Chem. Acc. - 2011. - Vol. 130, is. 4-6. - P609-632, DOI 10.1007/s00214-011-0936-6. - Cited Reference Count: 112. - Гранты: We would like to acknowledge scientific discussions with the following collaborators and friends: Daniel Chipman, Victor Ya. Artyukhov for common discussions concerning theoretical questions and methodology; John S. Tse and Dennis D. Klug for initial discussions concerning the properties of cyanoanthracene; and Yuriko Aoki for discussions of benzene and estradiol. We would also like to thank the following funding agencies and institutions for supporting this work during its various stages of development: Kyushu University, Japan; Steacie Institute for Molecular Sciences, Canada; University of Notre Dame, USA; Siberian Physical-Technical Institute, Russia; Siberian Federal University, Russia; Kirensky Institute of Physics, Russia. We would like to thank FAPESP for project 16782-2/2009 which allowed Prof. Jalkanen to visit LEVB at UniVaP for the period from June 2010 to May 2011 from the Quantum Protein (QuP) Center at the Technical University in Denmark during which time this work was completed. - Финансирующая организация: Kyushu University, Japan; Steacie Institute for Molecular Sciences, Canada; University of Notre Dame, USA; Siberian Physical-Technical Institute, Russia; Siberian Federal University, Russia; Kirensky Institute of Physics, Russia . - DEC. - ISSN 1432-881X
Рубрики:
DENSITY-FUNCTIONAL THEORY
   INITIO MOLECULAR-DYNAMICS
   CIRCULAR-DICHROISM SPECTRA
   LASER-INDUCED FLUORESCENCE
   NUCLEAR SHIELDING TENSORS
   ALANINE N'-METHYLAMIDE
   ALKALINE-EARTH DIMERS
   ABSORPTION-SPECTRA
   HYDRATED ELECTRON
   AQUEOUS-SOLUTION
Кл.слова (ненормированные):
organic compounds -- molecular dynamics -- photophysical properties -- electronic spectra -- electronic spectra -- molecular dynamics -- organic compounds -- photophysical properties
Аннотация: Three polycyclic organic molecules in various solvents focused on thermo-dynamical aspects were theoretically investigated using the recently developed statistical quantum mechanical/classical molecular dynamics method for simulating electronic-vibrational spectra. The absorption bands of estradiol, benzene, and cyanoanthracene have been simulated, and most notably, the increase in the spectral intensity for the lowest excited state transition as the temperature is increased observed experimentally is well reproduced. In addition, this method has been extended to treat luminescent processes also, and it is seen that the experimental emission spectrum of cyanoanthracene is also well described. The method still needs further refinement, but results to date, including those presented in this work, document clearly that our model is one which is able to treat the many complex effects that the environment have on electronic absorption and emission spectra.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Univ Notre Dame, Notre Dame Radiat Lab, Notre Dame, IN 46556 USA
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Vale Paraiba, Lab Biomed Vibrat Spectrscopy, Inst Res & Dev, BR-12244000 Sao Paulo, Brazil
Tech Univ Denmark, Dept Phys, Quantum Prot QuP Ctr, DK-2800 Lyngby, Denmark

Доп.точки доступа:
Pomogaev, V.; Avramov, P. V.; Аврамов, Павел Вениаминович; Kachin, S.; Pomogaeva, A.; Jalkanen, K. J.
}
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