ФИАН
Научная деятельность
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Рябчиков Юрий Витальевич канд. физ.-мат. наук
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Дополнительная информация
ORCID: 0000-0002-6844-1051,
Научные публикации Рябчикова Юрия Витальевича: http://sites.lebedev.ru/yuri/, пароль: yuri
Адреса электронной почты:
yur(at)lebedev.ru
Рябчиков Юрий Витальевич окончил кафедру общей физики и молекулярной электроники физического факультета МГУ по специальности "физика твёрдого тела" в 2003 году. По окончанию обучения продолжил научно-исследовательскую работу на той же кафедре под руководством профессора В.Ю. Тимошенко.
Основным направлением работы являлось изготовление кремниевых наноструктур на основе пористого кремния и исследование влияния молекулярного окружения кремниевых нанокристаллов на их оптические и электронные свойства.
В 2005 году Рябчиков Юрий Витальевич был награжден дипломом 1 степени за доклад "Процесс генерации синглетного кислорода с помощью пористого кремния" на VII Всероссийской молодежной конференции по физике полупроводников и полупроводниковой опто- и наноэлектронике.
В 2007 году защитил диссертацию на соискание ученой степени кандидата физико-математических наук по теме "Влияние молекулярного окружения кремниевых нанокристаллов на их фотолюминесцентные свойства".
В 2008 году прошёл конкурс и выиграл стипендию германского фонда академических обменов (ДААД) для прохождения 10-месячной стажировки в Helmholtz Zentrum Berlin (HZB) в Берлине, где совместно с немецкими коллегами занимался разработкой органических солнечных элементов.
С 2010 года начал работу в Физическом институте РАН им. П.Н. Лебедева, в лаборатории физики дефектов и радиационных явлений в полупроводниках под руководством А.А. Гиппиуса. В настоящий момент, является младшим научным сотрудником Лаборатория физики дефектов и радиационных явлений в полупроводниках отделениz физики тв`рдого тела.
Рябчиков Юрий Витальевич является автором (соавтором) 46 научных публикаций в рецензируемых зарубежных и российских журналах (на март 2023), индексируемых в базе данных Web of Science, выступает с докладами на международных и российских конференциях, выпустил 2 русскоязычные монографии. Является рецензентом в таких журналах как Applied Surface Science, Journal of Applied Physics, Mechanical Systems and Signal Processing, Journal of Physics and Chemistry of Solids, Diamond & Related Materials и другие. Индекс Хирша на март 2023 года - 15, общее количество цитирований, согласно базе данных Web of Science - 700.
Рябчиков Юрий Витальевич участвовал в организации научных конференций и семинаров, в частности, Advanced Laser Technologies (ALT) в 2014 (Кассис, Франция) и в 2019 году (Прага, Чехия), BiaTri Workshop в 2020 году (Прага, Чехия). Был приглашен ведущим секции "Технология и применения интенсивных, высокоэнергетичных лазеров" WS 102 на конференции, организованной сообществом SPIE в 2019 году в Праге, а также секции "Фотоника: основы, применения и интеграция" на конференции ALT-19 в 2019 году в Праге.
В настоящее время, в тесном сотрудничестве с коллегами из ведущих европейских лабораторий, Рябчиков Юрий Витальевич активно работает над созданием химически чистых композитных и гибридных наноматериалов для таких применений, как нанотермометрия, фотовольтаика, катализ, генерация водорода.
Однако, основное направление научной деятельности Рябчикова Юрия Витальевича связано с применением наноматериалов и лазеров среднего ИК диапазона для целей наномедицины с целью разработки методов неинвазивной диагностики и терапии онкологических и сердечно-сосудистых заболеваний. Данные исследования выполняются в рамках индивидуальной стипендии Марии Кюри (MSCA-IF) LADENTHER.
Основные научные интересы: твердотельные и металл-органические наноструктуры, взаимодействие лазерного излучения с веществом, биомедицинские применения лазеров и наноматериалов, сенсорика, светоизлучающие устройства, фотовольтаика.
Экспериментальные навыки: формирование наноструктур с помощью лазерной абляции, (электро-) химического травления, плазменно-химического осаждения из газовой фазы, электронная (просвечивающая высокого разрешения, сканирующая) и оптическая микроскопия, рентгеновская дифракция, спектроскопия (стационарная и время-разрешённая фотолюминесцентная, Рамановская,
электронный парамагнитный резонанс, эллипсометрия).
Публикации
2023
“Green” Fluorescent–Plasmonic Carbon-Based Nanocomposites with Controlled Performance for Mild Laser Hyperthermia , vol. 10, N11, pp. 1229, (2023)
аннотация
Fluorescent carbon nanodots are a promising nanomaterial for different applications in biophotonics, sensing and optical nanothermometry fields due to their strong fluorescence properties. However, their multi-modal applications are considerably limited, requiring the use of several nanoagents that could solve different tasks simultaneously. In this paper, we report the first experimental results on a facile “green” laser-based synthesis of multi-modal carbon–metallic nanocomposites with tuned optical performance. This simple approach leads to the appearance of finely controlled plasmonic properties in carbon-based nanocomposites whose spectral position is adapted by using an appropriate material. Thus, longer laser ablation provokes 29-fold increase in the absorption intensity of carbon–gold nanocomposites due to the increase in the metal content from 13% (30 s) to 53% (600 s). Despite strong plasmonic properties, the metal presence results in the quenching of the carbon nanostructures’ fluorescence (2.4-fold for C-Au NCs and 3.6-fold for C-Ag NCs for 600 s ablation time). Plasmonic nanocomposites with variable metal content reveal a ~3-fold increase in the laser-to-heat conversion efficiency of carbon nanodots matching the temperature range for mild hyperthermia applications. The findings presented demonstrate a facile approach to expanding the properties of chemically prepared semiconductor nanostructures due to the formation of novel semiconductor–metallic nanocomposites using a “green” approach. Together with the ease in control of their performance, it can considerably increase the impact of semiconductor nanomaterials
- MIROSLAVA FLIMELOVA
AN IMPACT OF THE LASER IRRADIATION TIME ON PROPERTIES OF COLLOIDAL SOLUTIONS OF SILICON NANOPARTICLES , pp. 6807, (2023)
аннотация
The design of semiconductor-metallic nanostructures using pulsed laser ablation in liquids (PLAL) is a very demanding task for biomedical applications being at an early stage of its development. Only few recent papers show the possibility of such a synthesis of composite nanoparticles as well as their perspectives for biosensing applications. However, mechanisms of the laser-stimulated formation of semiconductor-metallic nanoparticles involving several processes are not clarified yet being considerably depended on experimental conditions. In this work, we demonstrated an impact of the laser irradiation of colloidal solutions of silicon nanoparticles at different exposure time in the presence/absence of a gold target. In particular, longer ablation of the metal led to a stronger plasmonic maximum in silicon nanoparticles at around 520 nm. It also decreased the hydrodynamic size from 165 nm to 85 nm as well as the ξ-potential from –46 mV to –30 mV by increasing the ablation time from 0 s to 600 s. At the same time, the lowest electrical conductivity value (~1.5 μS/cm) of the plasmonic nanocomposites was detected at 120 s irradiation time. The highest concentration of synthesized composite nanoparticles (~3·1011 NPs/mL) was achieved at 180 s ablation time. Another purpose of the paper was to reveal an influence of the used laser irradiation on properties of the colloidal solutions of silicon nanoparticles themselves. It was found a considerable decrease of their absorbance with the increase of the laser exposure time that can be associated with the change of their properties (e.g. concentration, size, oxidation state etc.). Thus, the laser irradiation strongly affects properties of colloidal solutions of silicon nanoparticles that must also be taken into account considering possible mechanisms of the formation of composite nanostructures. Presented in the paper fast optical diagnostic can help to determine properties of colloidal solutions of nanocomposites formed by PLAL prior their biomedical or catalytic applications.
Multi-Modal Laser-Fabricated Nanocomposites with Non-Invasive Tracking Modality and Tuned Plasmonic Properties , vol. 13, N9, pp. 1381, (2023)
аннотация
Ultrapure composite nanostructures combining semiconductor and metallic elements as a result of ultrafast laser processing are important materials for applications in fields where high chemical purity is a crucial point. Such nanocrystals have already demonstrated prospects in plasmonic biosensing by detecting different analytes like dyes and bacteria. However, the structure of the nanocomposites, as well as the control of their properties, are still very challenging due to the significant lack of research in this area. In this paper, the synthesis of silicon–gold nanoparticles was performed using various approaches such as the direct ablation of (i) a gold target immersed in a colloidal solution of silicon nanoparticles and (ii) a silicon wafer immersed in a colloidal solution of plasmonic nanoparticles. The formed nanostructures combine both plasmonic (gold) and paramagnetic (silicon) modalities observed by absorbance and electron paramagnetic resonance spectroscopies, respectively. A significant narrowing of the size distributions of both types of two-element nanocrystals as compared to single-element ones is shown to be independent of the laser fluence. The impact of the laser ablation time on the chemical stability and the concentration of nanoparticles influencing their both optical properties and electrical conductivity was studied. The obtained results are important from a fundamental point of view for a better understanding of the laser-assisted synthesis of semiconductor–metallic nanocomposites and control of their properties for further applications.
Plasmon-affected luminescent nanothermometry with multi-band SiNPs/SiNX nanocomposites , vol. 260, pp. 119891, (2023)
аннотация
The design of luminescent multi-functional nanoplatforms that can be simultaneously employed for various
applications is still an important research task nowadays. Nanosilicon is one of the most promising nanomaterial
having unique structural and optoelectronic properties that can be used in biomedicine, optoelectronics, sensing
and nanothermometry. However, its properties do not allow the creation of one luminescent multi-functional
nanoplatform requiring merging of different nanomaterials. In this work, temperature-sensitive silicon-based
nanocomposites with tuned multi-band emission are demonstrated. One can easily achieve the change of their
single- and multi-band photoluminescence spectral position from ~1.6 eV to ~2.9 eV by varying the experimental
parameters. Moreover, the “white” emission of silicon nitride is also observed that can be further applied
for sensing or optoelectronic applications. Furthermore, the presence of silver nanoparticles leads to 80% increase
of the temperature sensitivity of the photoluminescence maximum position (from ~540 μeV/◦ C to ~975
μeV/◦C). The plasmonic nanostructures also considerably modify the ratiometric temperature behavior of
nanocomposite emission. The shown findings suggest perspectives of silicon-based nanostructures as multi-task
luminescent nanoplatforms in the fields of nanothermometry, molecule sensing, optoelectronics and
biomedicine.
Laser-Assisted Nanosynthesis of Fluorescent Carbon Nanocomposites with Variable Plasmonic Properties , pp. 1-1, (2023)
аннотация
Laser-assisted material processing using ultrafast laser sources is an important and promising research direction aiming surface or volumetric modifications of different materials. In particular, pulsed laser ablation in liquids (PLALs) method allows forming a wide set of nanostructures in the form of colloidal solutions. Recently, this approach has also been demonstrated as an effective facile route of the successful formation of silicon-gold nanoparticles (Si-Au NPs) [1] that extended the application of silicon nanostructures in the field of plasmonics [2]. Nevertheless, the laser-assisted nanosynthesis of multi-element semiconductor-metallic nanoparticles is still challenging being at the initial stage of its development.
- M Flimelová, YV Ryabchikov, NM Bulgakova, J Behrends
A Facile Route of Manufacturing and Improvement of Plasmonic Nanostructures towards Magnetic Resonance Applications , pp. 68, (2023)
аннотация
Multicomponent nanostructures consisting of several elements have attracted a broad research interest being served for various aspects in the field of biosensing, catalysis, photovoltaics and biomedicine. Their synthesis by a pulsed laser ablation in a water enables eliminating various side effects originated from chemical contamination. Variable experimental conditions lead to tuning plasmonic and magnetic features influenced by physicochemical reactions during synthesis, thus enhancing their functionality. In this work, we performed synthesis of hybrid AuSi nanoparticles (NPs) with novel modalities by ultrashort laser ablation of bulk gold in water containing silicon NPs. The Au/Si atomic ratio in the nanohybrids was finely varied from 0.5 to 3.5 when changing the initial Si NPs concentration in water from 70 µg/mL to 10 µg/mL respectively. It has been found that the laser-fluence-insensitive silicon content depends on the mass of nanohybrids. A high concentration of paramagnetic defects (2.2 ꞏ1018 spin/g) in polycrystalline plasmonic NPs has been achieved. Our findings can open further prospects for plasmonic nanostructures as contrast agents in optical and magnetic resonance imaging techniques, biosensing and cancer theranostics.
- M Flimelová, YV Ryabchikov, NM Bulgakova, J Behrends
A Facile Route of Manufacturing and Improvement of Plasmonic Nanostructures towards Magnetic Resonance Applications , pp. 68, (2023)
аннотация
Multicomponent nanostructures consisting of several elements have attracted a broad research interest being served for various aspects in the field of biosensing, catalysis, photovoltaics and biomedicine. Their synthesis by a pulsed laser ablation in a water enables eliminating various side effects originated from chemical contamination. Variable experimental conditions lead to tuning plasmonic and magnetic features influenced by physicochemical reactions during synthesis, thus enhancing their functionality. In this work, we performed synthesis of hybrid AuSi nanoparticles (NPs) with novel modalities by ultrashort laser ablation of bulk gold in water containing silicon NPs. The Au/Si atomic ratio in the nanohybrids was finely varied from 0.5 to 3.5 when changing the initial Si NPs concentration in water from 70 µg/mL to 10 µg/mL respectively. It has been found that the laser-fluence-insensitive silicon content depends on the mass of nanohybrids. A high concentration of paramagnetic defects (2.2 ꞏ1018 spin/g) in polycrystalline plasmonic NPs has been achieved. Our findings can open further prospects for plasmonic nanostructures as contrast agents in optical and magnetic resonance imaging techniques, biosensing and cancer theranostics.
все публикации
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