Персона: Чистяков, Александр Александрович
Загружается...
Email Address
Birth Date
Научные группы
Организационные подразделения
Организационная единица
Институт нанотехнологий в электронике, спинтронике и фотонике
Институт ИНТЭЛ занимается научной деятельностью и подготовкой специалистов в области исследования физических принципов, проектирования и разработки технологий создания компонентной базы электроники гражданского и специального назначения, а также построения современных приборов на её основе.
Наша основная цель – это создание и развитие научно-образовательного центра мирового уровня в области наноструктурных материалов и устройств электроники, спинтроники, фотоники, а также создание эффективной инновационной среды в области СВЧ-электронной и радиационно-стойкой компонентной базы, источников ТГц излучения, ионно-кластерных технологий материалов.
Статус
Фамилия
Чистяков
Имя
Александр Александрович
Имя
39 results
Результаты поиска
Теперь показываю 1 - 10 из 39
- ПубликацияОткрытый доступRADIOVISION IN THE TERAHERTZ RANGE: PROBLEMS AND PROSPECTS(НИЯУ МИФИ, 2023) Chistyakov, A. A.; Akmalov, A. E.; Kotkovskii, G. E.; Kozlovskii, K. I.; Maksimov, E. M.; Martynov, I. L.; Osipov, E. V.; Kuzishchin, Yu. A.; Plekhanov, A. A.; Осипов, Евгений Валерьевич; Козловский, Константин Иванович; Котковский, Геннадий Евгеньевич; Мартынов, Игорь Леонидович; Максимов, Евгений Михайлович; Чистяков, Александр Александрович; Акмалов, Артём ЭдуардовичAn analysis of the current state of research and development in the fi eld of radiovision for the terahertz range of electromagnetic radiation was carried out in the work. Various sources of terahertz radiation are considered: photoconductive antennas, IMPATT diodes, Schottky diodes, and others, as well as modern video cameras for this range and their main characteristics for recording and studying THz images in various spectral regions. The results of studies of the intensity distribution in THz radiation beams at diff erent wavelengths for photoconductive antennas using THz radiovision, as well as the possibilities of studying scattering processes during refl ection and transmission of THz radiation for various materials, are presented.
- ПубликацияОткрытый доступСПОСОБ РЕГИСТРАЦИИ СИГНАЛОВ ЛЮМИНЕСЦЕНЦИИ И РАССЕЯНИЯ ОТ АЭРОЗОЛЬНЫХ ЧАСТИЦ ПРИ ИХ ВОЗБУЖДЕНИИ В СТРУЕ И СИСТЕМА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ(2023) Котковский, Г. Е.; Чистяков, А. А.; Мартынов, И. Л.; Кузищин, Ю. А.; Акмалов, А. Э.; Осипов, Е. В.; Осипов, Евгений Валерьевич; Кузищин, Юрий Александрович; Мартынов, Игорь Леонидович; Котковский, Геннадий Евгеньевич; Чистяков, Александр Александрович; Акмалов, Артём ЭдуардовичНастоящее изобретение относится к области контрольно-измерительной техники и касается способа регистрации сигналов люминесценции и рассеяния от аэрозольных частиц при их возбуждении в струе. Способ включает засвечивание возбуждающим лучом воздушного потока струи с аэрозолем, сбор и разделение на, по меньшей мере, три канала оптических сигналов рассеяния и люминесценции в блоке спектрального разделения и направление сигналов на приемники оптического излучения. При этом ось сбора оптических сигналов рассеяния и люминесценции перпендикулярна оси возбуждающего луча. При осуществлении способа производят формирование воздушного потока струи аэрозоля в анализируемом объеме проточно-оптической камеры, в которую воздушные потоки поступают из побудителя расхода воздуха. Скорость, оптимальную для пролёта в анализируемом объёме аэрозольных частиц определённых размеров, определяют в электронном блоке управления на основании данных, поступающих с приемников оптического излучения. Технический результат заключается в повышении чувствительности и обеспечении возможности детектирования аэрозольных частиц малого сечения. 2 н. и 9 з.п. ф-лы, 1 ил.
- ПубликацияТолько метаданныеSol-Gel Fabrication and Luminescence Properties of Multilayer Eu-Doped BaTiO3-SiO2 Xerogel Nanostructures(2019) Karnilava, Yu. D.; Kholov, P. A.; Raichenok, T. F.; Tikhomirov, S. A.; Gaponenko, N. V.; Martynov, I. L.; Osipov, E. V.; Chistyakov, A. A.; Kargin, N. I.; Гапоненко, Николай Васильевич; Мартынов, Игорь Леонидович; Осипов, Евгений Валерьевич; Чистяков, Александр Александрович; Каргин, Николай ИвановичWith the use of sol-gel method BaTiO3-SiO2 multilayer structures were fabricated on glass or fused silica substrates employing dipping or spinning procedure. The photonic stop band was observed in the reflection and transmission spectra of the multilayer structure annealed at 450 degrees C. It is redshifted with an increase of the thicknesses of BaTiO3 and SiO2 layers. For structures comprising Eu-doped BaTiO3 layers of different thicknesses photoluminescence with the main band at 614 nm was detected. It is characterized with the double-exponential decay with the lifetimes of about 0.5 ms and 1.1 ms which do not depend significantly on the photonic stop band position.
- ПубликацияТолько метаданныеAnalytic Modeling of the of J- V Characteristics of Quantum Dot-Based Photovoltaic Cells(2019) Tameev, A. R.; Aleksandrov, A. E.; Saunina, A. Yu.; Nikitenko, V. R.; Chistyakov, A. A.; Zvaizgne, M. A.; Саунина, Анна Юрьевна; Никитенко, Владимир Роленович; Чистяков, Александр АлександровичAn analytic model of J-V characteristics of photovoltaic devices based on quantum dot (QD) solids is developed. The model yields the upper estimation of the power conversion efficiency and predicts its extremal dependence on the diffusion length of excitons. The predictive power of our model is approved by the comparison with the experimental data for PbS QD-based solar cells.
- ПубликацияТолько метаданныеSpectral identification of traces of explosives in reflected terahertz radiation(2019) Akmalov, A. E.; Aksenov, E. A.; Kotkovskii, G. E.; Kozlovskii, K. I.; Maksimov, E. M.; Plekhanov, A. A.; Chistyakov, A. A.; Акмалов, Артём Эдуардович; Котковский, Геннадий Евгеньевич; Козловский, Константин Иванович; Максимов, Евгений Михайлович; Плеханов, Андрей Александрович; Чистяков, Александр Александрович© 2019 SPIE.The work is devoted to the influence of scattering of terahertz (THz) radiation by hexogen particles (RDX) in powdery samples on their transmission and reflection spectra. A terahertz radio-vision installation with spectral resolution was used to determine experimentally THz spectra of RDX. For samples with small RDX particles (the typical particle size is 100 μm), characteristic peaks at 0.8 THz and 1.06 THz are observed in absorption spectra despite scattering, that can be used to identify this substance. For large hexogen particles (a typical particle size is 450 μm), experiments and numerical simulation showed that even the most intense peak at 0.8 THz is not observed in absorption spectra, and the spectra are mainly due to the scattering effect and its depending on the wavelength of radiation. The reflection spectra of RDX layers (particle size is about 100 μm) qualitatively differ from the reflection spectra of RDX crystals and are formed as a result of absorption during propagation of THz radiation in the particle layer. Thus, the substance can be identified by absorption spectra in a reflection scheme.
- ПубликацияТолько метаданныеDetection of vapors of explosives by field asymmetric ion mobility spectrometry method with laser ionization(2019) Akmalov, A. E.; Chistyakov, A. A.; Kotkovskii, G. E.; Kostarev, V. A.; Акмалов, Артём Эдуардович; Чистяков, Александр Александрович; Котковский, Геннадий Евгеньевич; Костарев, Виталий Алексеевич© 2019 SPIE.The features of laser ionization of trinitrotoluene and hexogen at registration of ionization products by field asymmetric ion mobility spectrometer were investigated in this paper. The optimal range of intensity to obtain the maximum ion current was determined, and it was shown that composition of ions of explosives is changed with the change of intensity. The values of intensity and radiation at which it is possible to obtain spectra of nonlinear ion mobility with different composition of RDX and TNT ions were determined, which is promising for increasing the selectivity of registration. It was shown that ion peaks of TNT and RDX at laser ionization are characterized by low nonlinear mobility coefficients in comparison with a radioactive source based on Ni63, which indicates a more selective mechanism of laser ionization of these explosives at atmospheric pressure.
- ПубликацияТолько метаданныеPyrimidine-based dyes embedded in porous silicon microcavities for detection of nitroaromatic compounds(2019) Verbitskiy, E. V.; Baranova, A. A.; Rusinov, G. L.; Charushin, V. N.; Martynov, I. L.; Osipov, E. V.; Kuzishchin, Y. A.; Kotkovskii, G. E.; Chistyakov, A. A.; Мартынов, Игорь Леонидович; Осипов, Евгений Валерьевич; Кузищин, Юрий Александрович; Котковский, Геннадий Евгеньевич; Чистяков, Александр Александрович© 2019 SPIE.It is known that luminescent optical sensors are perspective for detection towards nitroaromatic compounds that are a basis of a many kind of explosives. Operation of these sensors is based on quenching luminescence, which is caused by photo-induced electron transfer from a luminophore (donor) to a nitroaromatic molecule (acceptor). The conjugated polymers, small molecule dyes and metal-organic frameworks are used as a sensitive luminophores currently. One of the methods to improve these sensors is embedding the luminophore into porous matrix with properties of photonic crystal, which may be a porous silicon (pSi) Bragg mirror or a microcavity (MC). The PPV derivatives polymers are usually used as the sensitive luminophores for embedding into pSi matrix. However, there is a task to find an optimal set of luminophores to develop a highly sensitive and selective sensor. In this work we investigate embedding of 5- triphenylamino-4-(triphenylaminothiophen-2-yl)-pyrimidine (HEM-461) into pSi MC and examine the sensitivity of obtained structures. The pSi MC were fabricated using a standard electrochemical etching process. The eigenmode of the pSi MC had a width of 4-6 nm. The samples were oxidized to stabilize the surface chemical properties and to prevent quenching of luminescence of the embedded luminophores after fabrication. The embedding of the dye into the pSi MC was performed at excess pressure. Well known conjugated polymer MDMO-PPV was used as a reference. In this work, we compared the photophysical properties of MDMO-PPV and HEM-461 in solution and into pSi MC. The luminescence parameters and resistance to heat have been studied. Comparative studies of sensitivity of MDMO-PPV and HEM-461 to trinitrotoluene in liquid and gaseous phases have been carried out. It was concluded that pSi MC with embedded HEM-461 is a promising structure for developing sensors of nitroaromatic compounds.
- ПубликацияТолько метаданныеHigh-performance aerosol collector with liquid phase circulation and pre-concentration of particles(2019) Verdiev, B. I.; Gushchin, V. A.; Tkachuk, A. P.; Akmalov, A. E.; Kotkovskii, G. E.; Stolyarov, S. V.; Chistyakov, A. A.; Акмалов, Артём Эдуардович; Котковский, Геннадий Евгеньевич; Чистяков, Александр Александрович© 2019 SPIE.Testing the environment for bio-aerosols is an important feature of biosafety in the modern world. It is often necessary to collect aerosols from large areas in a short time, which requires outstanding collection efficiency, sufficiently high flow rate of incoming air and ability to maintain the viability of the collected samples. The paper presents the results of creating an effective sampling device capable of operating at airflow rates of 4000 liters per minute. The device consists of two functional parts - a virtual impactor and a cyclone collector with liquid phase of deposition. We present all the necessary calculations and algorithm to simulate parameters of the impactor. The sampling device was tested using dry and liquid dispersed particles with a diameter of 0.5 to 5 μm. We demonstrated that at a flow rate of about 4000 l / min, the efficiency of collecting of particles is more than 20% of the total aerosol mass, and at a flow rate of more than 300 l / min, this value exceeds 60 %. The proposed device supports the viability of the collected microorganisms. The paper also presents the results of testing the device at infrastructure objects. The device is portable, with easy settings for sampling and cleaning, and can be controlled remotely over a network.
- ПубликацияТолько метаданныеApplication of a cyclone collector with a recirculating liquid phase for concentrating microparticles, localized as traces on surfaces(2019) Akmalov, A. E.; Chistyakov, A. A.; Kotkovskii, G. E.; Turbin, D. S.; Акмалов, Артём Эдуардович; Чистяков, Александр Александрович; Котковский, Геннадий Евгеньевич; Турбин, Денис Сергеевич© 2019 SPIE.The study of using a cyclone collector with a liquid recirculation phase for collecting microparticles of TNT (trinitrotoluene) explosive, located in the form of traces on solid and fibrous surfaces was conducted in this work. Fragments of fibrous nonwoven material, as well as flax fabric fragments were used as a basis on which TNT powder was randomly distributed. The TNT sample area was about 900 cm2. The cyclone collector with recirculating liquid phase originally designed for aerosol particles collection was used as a device for pre-concentration of explosives particles. Inlet air velocity was equal to 500 cm3 /min. Quantitative measurements of collected TNT amount were provided by gas chromatography - mass-spectrometry method. Experiments to compare the efficiency of cyclone collector sampling to the currently used methods of explosives microparticles collection - by wiping of surfaces and by dry filtration - were carried out. Cyclone collector showed high collection efficiency, amounting to 91% by weight of originally TNT spread on the surface that is more than 3 times higher than efficiencies of the wiping method (24% of the total mass of the trace) and the dry filtration method (23% of the total mass of the trace).
- ПубликацияТолько метаданныеPbS Quantum Dots with Inorganic Ligands: Physical Modeling of the Charge and Excitation Transport in Photovoltaic Cells(2021) Aleksandrov, A. E.; Tameev, A. R.; Saunina, A. Y.; Zvaigzne, M. A.; Chistyakov, A. A.; Nikitenko, V. R.; Martynov, I. L.; Саунина, Анна Юрьевна; Чистяков, Александр Александрович; Никитенко, Владимир Роленович; Мартынов, Игорь Леонидович© 2021 American Chemical Society.In photovoltaic cells based on PbS colloidal quantum dot (CQD) solids, the photoconductivity and efficiency for PbS CQDs with inorganic atomic ligands of tetrabutylammonium iodide (TBAI) are reasonably larger than those for PbS CQDs with molecular ligands of the same length. The TBAI ligands can act as electron-transporting sites and contribute to the increase in mobility. The developed simple model allows the maximum efficiency of a CQD solar cell to be determined, which can be achieved by eliminating the recombination losses of charge carriers. Both experimental data and theoretical modeling testify in favor of the hopping nature of the electron transport in CQD-solids.