Персона:
Гончуков, Сергей Александрович

Организационные подразделения

Организационная единица

Институт лазерных и плазменных технологий

Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.

Фамилия

Гончуков

Имя

Сергей Александрович

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Теперь показываю 1 - 10 из 26

Только метаданные
Electroactive nanostructured antibacterial materials
(2022) Saraeva, I. N.; Zayarny, D. A.; Tolordava, E. R.; Nastulyavichus, A. A.; Gonchukov, S. A.; Гончуков, Сергей Александрович
© 2022 Astro Ltd.Thin nanostructured metal (Au, Ag) films, magnetron-sputtered on semiconductor (n-type Si) substrate under 6 V voltage exposure for 15 min, exhibit high antibacterial effect against the food pathogens S. aureus and P. aeruginosa. Nanostructures were formed by femtosecond laser ablation, resulting in an array of microspots. The observed effect is caused by the emergence of submicron, laterally periodical static electric and magnetic fields, adjacent to the metal film, causing the abrupt voltage drops, which induce the hyperpolarization of the cell membrane and increase its permeability, resulting in the formation of pores (electroporation) in the membrane and the subsequent apoptosis of the bacterial cell. Additional factors, which enhance the antibacterial effect of the studied materials, are the volume convection in the liquid drop with bacterial culture, caused by the moderate heating of the substrate to 45 °C-50 °C during the electric current flow and electro-taxis of bacteria to the charged nanostructured metal film.
Открытый доступ
Внутрирезонаторная отражательная лазерная фазометрия
(1987) Баранков, В. В.; Гольтяев, О. М.; Гончуков, С. А.; Гончуков, Сергей Александрович
Только метаданные
Fabrication of micro-optical connectors for electro-optical sensor devices by a combined femtosecond laser system
(2021) Epifanov, E. O.; Tarkhov, M. A.; Timofeeva, E. R.; Trofimov, I. V.; Gonchukov, S. A.; Гончуков, Сергей Александрович
© 2021 Astro Ltd.The article demonstrates the fundamental possibility of creating microstructures for various functional purposes using the capabilities of the two-photon femtosecond polymerization method. The developed technological approach for creating a micro-optical holder for standard single-mode and multimode fibers is demonstrated. This type of holder can be used to manufacture a unit for optical matching of optical fibers with sensitive optical elements. The possibility of optical matching of fibers with a superconducting single-photon detector, an array system of bolometric superconducting microbridges, and spherical self-formed microlenses by near infrared-sensitive photopolymerization has been experimentally shown. The device manufacturing process was carried out in a combined single laser micromachining facility using femtosecond laser radiation for lithography with submicron resolution, texturing of the sensor surface, and the formation of microstructures for installing single-mode optical fibers.
Открытый доступ
ДИФФЕРЕНЦИАЛЬНАЯ ДИАГНОСТИКА БАКТЕРИЙ МЕТОДОМ РАМАНОВСКОЙ СПЕКТРОСКОПИИ ПРИ НИЗКОМ ОТНОШЕНИИ СИГНАЛ/ШУМ
(НИЯУ МИФИ, 2026) БАЙКОВА, Т. В.; ГОНЧУКОВ, С. А.; БАЙКОВ, В. М.; Гончуков, Сергей Александрович; Байкова, Татьяна Валерьевна
В работе рассмотрены подходы к дифференциальной диагностике различных видов бактерий методом рамановской спектроскопии в условиях низкого отношения сигнал/шум. Актуальность исследования обусловлена слабой интенсивностью рамановского рассеяния, влиянием флуоресцентного фона и вариабельностью регистрации, что затрудняет выделение устойчивых диагностических признаков.
Открытый доступ
Исследование устойчивости плоских и пространственных ломаных оптических резонаторов (ЛОР)
(1988) Гончуков, С. А.; Ковшов, М. В.; Шевченко, В. Г.; Гончуков, Сергей Александрович
Только метаданные
One-step additive LIFT printing of conductive elements
(2024) Nastulyavichus, A.; Kudryashov, S.; Shelygina, S.; Gonchukov, S.; Гончуков, Сергей Александрович
Только метаданные
Generation of silver nanoparticles from thin films and their antibacterial properties
(2022) Nastulyavichus, A.; Kudryashov, S.; Tolordava, E.; Rudenko, A.; Gonchukov, S.; Гончуков, Сергей Александрович
© 2022 Astro Ltd.Colloidal solutions of silver nanoparticles (NPs) were obtained by ultrashort-pulse laser ablation of silver films of variable thickness in water at different fluences, pulse durations and laser exposures. Characterization of these particles was performed by scanning electron microscopy, optical transmission spectroscopy, and dynamic light scattering. A monotonic increase in the extinction coefficient and in the average diameter of the colloidal particles - from 20 to 180 nm - was observed as a function of laser fluence and exposure. Antibacterial properties of colloidal silver NPs were investigated by the microbiological 'Live/Dead Biofilm Viability Kit' method.
Только метаданные
The optical refractometry using transport-of-intensity equation
(2022) Gritsenko, I. V.; Kovalev, M. S.; Stsepuro, N. G.; Gulina, Y. S.; Gonchukov, S. A.; Гончуков, Сергей Александрович
© 2022 Astro Ltd.A development of a method for measuring the refractive index of optical media based on the transport-of-intensity equation (TIE) is proposed. The method requires only a complementary metal-oxide semiconductor (CMOS) camera, which registers intensity distributions in several planes. The obtained intensity distributions are used to solve the TIE, known as a non-interferometric and deterministic method of measuring the phase of a light wave. Simple physical relations connecting the phase of the light wave that has passed through an optical medium and its refractive index allows to determine the latter. The results of the experiment confirm the applicability of the proposed method to the problems of optical refractometry.
Только метаданные
The Evolution of Surface-Selective Laser Sintering: Modifying and Forming 3D Structures for Tissue Engineering
(2020) Minaev, N. V.; Demina, T. S.; Minaeva, S. A.; Akopova, T. A.; Dulyasova, A. A.; Minaeva, E. D.; Gonchukov, S. A.; Гончуков, Сергей Александрович
© 2020, Allerton Press, Inc.Abstract: The use of surface-selective laser sintering is considered for creating and modifying the architecture of three-dimensional structures from biocompatible and bioresorbable polylactide materials. The approach allows to eliminate the thermal degradation of sintered materials by localizing heating processes on their surfaces. This is achieved via the selective absorption of mid-infrared laser radiation (1.9 μm) by a thin layer of water droplets deposited on the surfaces of polymer particles (polymer fibers) or the use of hygroscopic coatings that absorb the energy of laser radiation better than the polymer material.
Только метаданные
Directional autonomous water flow in laser-engineered microfluidic gradient structures on polymethylmetacrylate-coated steel surface
(2020) Krylach, I. V.; Kudryashov, S. I.; Fokina, M. I.; Sitnikova, V. E.; Gonchukov, S. A.; Гончуков, Сергей Александрович
© 2020 Astro Ltd.Autonomous directional water flow was demonstrated on a laser-microstructured steel-supported polymethylmetacrylate (PMMA) film with a surface tension gradient. For this purpose, a 4 μm-thick PMMA layer on AISI 304 steel surface was raster-scanned in air in ablative mode by a 1064 nm, 100 ns laser beam in a number of lines, with the amount and topography of ablated PMMA analyzed by optical microscopy, profilometry and IR spectroscopy. Such scanning, performed at increasing incident fluences, produced a series of chemically and topographically modified, differently water-wet neighbouring mm-sized spots, autonomously driving single-droplet water flow along the surface tension (contact angle) gradient.